Top 4 Frequency Alarm System Reviews

VJOYCAR Wireless Car Alarm 2-Way LCD Pager Remote Control DIY Install Universal Vehicle Anti-Theft Security Siren Horn System with Shock Vibration Window Door Trunk Open Alarm

... many cables, no need cut any origianl car cables,no damage to original car circuit, the shock sensor and the air pressure sensor are wireless to siren..
【DIY Install Car Alarm】5 minutes to DIY Install: just need connect the siren black / red cable to car battery positive and negative port, then connect the high frequency antenna to siren connector, find a location and fix siren around the wiper, installation done! Don't like the normal car alarm, no need send to the car service shop for professional install, cost effective..
【2-way Pager Car Alarm】Built in air pressure sensor, when detect car door/window/trunk open illegally, the siren will alarm, and notify to LCD remote control.
built in vibration/motion sensor, when detect car vibration or motion, the siren will alarm and notify to LCD remote control also..
【Long Distance Alarm】The high frequency antenna ensure the car alarm system can be valid for 1000 meters..
【Universal Car Alarm】Universal for cars 12-15V power input, pls don't install it if more than 15V voltage. Please contact with us at any time if you need assistance during installation or usage..

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Guardline 1/4 Mile Range Wireless Driveway Alarm [2 Motion Detector Alarm Sensors & 1 Receiver] Weatherproof Outdoor Security Alert System for Home & Property

Security - Feel a sense of safety around your home with our weatherproof perimeter alarm set. It's sensitive to heat and motion during the day and at night, making it an alert system you can count on.
Easy to Install - No need to call in an expensive technician for this home security system. Our outdoor motion sensor alarm is a plug-and-play device that installs in minutes..
Long Range - With 2 motion sensors and 1 receiver, each driveway sensor also has a wireless range of up to 1/4 mile for plenty of coverage around your property..
Compatibility - This motion detector alarm unit runs at 915 MHz. If you are expanding your Guardline wireless alarm system, please make sure you are purchasing the same frequency as your existing set..
Customizable - Regardless of the size of your home and property, you can configure this system of motion detectors with a motion alarm sensor add on, or extra receivers for greater peace of mind..

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Guardline 1/4 Mile Range Wireless Driveway Alarm [1 Motion Detector Alarm Sensor & 1 Receiver] Weatherproof Outdoor Security Alert System for Home & Property

Security - Feel a sense of safety around your home with our weatherproof perimeter alarm set. It's sensitive to heat and motion during the day and at night, making it an alert system you can count on..
Easy to Install - No need to call in an expensive technician for this home security system. Our outdoor motion sensor alarm is a plug-and-play device that installs in minutes..
Long Range - With 1 motion sensor and 1 receiver, each driveway sensor also has a wireless range of up to 1/4 mile for plenty of coverage around your property..
Compatibility - This motion detector alarm unit runs at 915 MHz. If you are expanding your Guardline wireless alarm system, please make sure you are purchasing the same frequency as your existing set..
Customizable - Regardless of the size of your home and property, you can configure this system of motion detectors with a motion alarm sensor add on, or extra receivers for greater peace of mind..

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Car Horn Siren Alarm,Universal Car Alarm Security Protection System with 2 Remote Controls,7-Level Sensitivity,12v,Anti-Theft Device,No Thread Trimmin,Non-Destructive Installation (CW-8131)

...ables,no damage to original car circuit, the shock sensor and the air pressure sensor are wireless to siren..
【DIY Install Car Alarm】5 minutes to DIY Install: just need connect the siren black / red cable to car battery positive and negative port, then connect the high frequency antenna to siren connector, find a location and fix siren around the wiper, installation done! Don't like the normal car alarm, no need send to the car service shop for professional install, cost effective..
【2-way Pager Car Alarm】Built in air pressure sensor, when detect car door/window/trunk open illegally, the siren will alarm, and notify to LCD remote control.
built in vibration/motion sensor, when detect car vibration or motion, the siren will alarm and notify to LCD remote control also..
【Long Distance Alarm】The high frequency antenna ensure the car alarm system can be valid for 1000 meters..
【Universal Car Alarm】Universal for cars 12-15V power input, pls don't install it if more than 15V voltage. Please contact with us at any time if you need assistance during installation o....

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Guardline 500 Foot Long Range Driveway Wireless Alarm [1 Sensor] - Outdoor Weather Resistant Motion Sensor & Detector-Security Alert System - Monitor & Protect Outside Property

Compatible: Extra sensor is only compatible with the 500 ft Guardline driveway motion sensor alarm system. This sensor runs at 915 MHz. Please make sure you are purchasing the same frequency as your existing set..
Security: The wireless driveway alarm system is sensitive to both heat and motion, during the day or at night, and constructed to be weatherproof. Regardless of conditions you will always be able to rely on it and feel a sense of safety..
Easy To Install: Can easily be added to your existing Guardline home security system. There is no need to disrupt your existing system. Simply add the extra sensor. Installation Tip: Do not point perimeter alarm sensor toward sun..
Customizable: Regardless of the size of your home and property, you can customize the wireless alarm system with a motion sensor add on for greater peace of mind. Add up to 16 sensors. Note: 500 ft model is not compatible with 1/4 mile model..

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Serene Innovations Centralalert Notification System Ca360h Vibrating Alarm Clock/receiver with Hanging Door Knock Sensor for Deaf or Hearing Loss Impaired Disabled

CA360 Vibrating Clock Receiver Features: An unlimited number of CentralAlert CA360 system can be used in close proximity, such as in apartment buildings or hotels Alerts to alarm clock, doorbell, door knocks, phone/fax, audio alarm, baby, weather, motion and more (sold separately).
Supports up to 4 CA-DB doorbells and CA-DX door knock sensors (in any combination) Supports up to 10 CA-RX remote receivers, 10 CA-PX personal pagers, 10 CA-AX audio sensors, 4 CA-SOS emergency SOS pendants, 3 CA-BX baby cry sensors, 1 CA-CX phone sensor and 1 CA-NOAA weather alert sensor Alarm clock has adjustable brightness display, dual alarm settings and dual bed shaker jacks (one bed shaker included).
1.25" bright clock display Adjustable loud audio sound and bright flasher Big and easy to see alerting icons 2.4GHz frequency.
Uses 520Hz square-wave technology for maximum audio alert, found to be more effective in alerting people with hearing loss Up to 200 ft operating range Dimensions: 6.5" x 4.5" x 2.25" Battery backup 4 AA NiMH (batteries not included).
CA-DXH Door Knock Sensor Features: 2.4GHz operating frequency Up to 210 ft operating range Uses 2 AA alkaline batteries (not included) Dimensions: 2.5" x 3.8" x 1" * Accessories sold separately..

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Welding Machine 28KHz TBVECHI Handheld Ultrasonic Spot Welder Plastic Welding Machine Portable for ABS/PP/PE

【Ultrasonic Spot Welder】28KHz TBVECHI Handheld Ultrasonic Spot Welder Plastic Welding Machine Portable for ABS/PP/PE. Equipped with super folding gray industrial-grade cable cable connecting line with soft folding resistance..
【Description】The machine can use in high frequency electronic system will be converted to high-frequency mechanical vibration, through welding mold to the plastic body, make the plastic joint face sharp friction melt, caused the plastic body joint surface between "plastic flow of material, instantaneous agglutination process..
【Features】Novel portable structure design, quick and convenient operation and movement. Handgrip operation, flexible and practical, simple operation. Automatic tracking system, no manual tuning frequency automatic tracking frequency..
【Useful】Unique appearance design, all-steel shell, all-aluminum heat dissipation, thin film panel, plastic spraying treatment. Time setting, overload alarm, frequency deviation alarm, frequency current display LCD display at a glance. Strong power, up to 700W, can be continuous or pulse work, in particular, suitable for 1-15mm melting point is used..
【Guaranteed】This item will ship from USA, delivery time need about 5-8 days. If there is any questions please ....

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Guardline 500 Foot Range Wireless Driveway Alarm [2 Motion Detector Alarm Sensors & 1 Receiver] Weatherproof Outdoor Security Alert System for Home & Property

Security - Feel a sense of safety around your home with our weatherproof perimeter alarm set. It's sensitive to heat and motion during the day and at night, making it an alert system you can count on..
Easy to Install - No need to call in an expensive technician for this home security system. Our outdoor motion sensor alarm is a plug-and-play device that installs in minutes..
Long Range - With 2 motion sensors and 1 receiver, each driveway sensor also has a wireless range of up to 500 feet for plenty of coverage around your property..
Compatibility - This motion detector alarm unit runs at 915 MHz. If you are expanding your Guardline wireless alarm system, please make sure you are purchasing the same frequency as your existing set..
Customizable - Regardless of the size of your home and property, you can configure this system of motion detectors with a motion alarm sensor add on, or extra receivers for greater peace of mind..

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Supplying Demand CP115 SPCP115 HVAC/R Condensate Pump with Alarm 1/10HP 115VAC

High quality pump designed to remove condensate from AC systems, condensing furnaces and boilers, ice machines, drinking fountains, and coolers. These pumps incorporate an audible alarm, and an overflow switch that can be used to shut down the system..
Applications include HVACR, ice machines, drinking fountains, and coolers..
22 feet of standard lift at 10 GPH | Independent NC safety switch & motor switch | Suitable for acidic condensate | 1/4 inch quick-connect terminals | 3 terminals are provided for easy connection | Independent NO audible alarm switch rated at 80 dB.
Specially designed leak-free motor and safety float | 3/8 inch rubber ball check valve | Vibration absorbing feet | Metal side mount tabs, 11-1/2 inches on center | 3 inlet holes | 6 foot power cord included.
Alarm Sound Level: 80 dB | Maximum Temperature: 110° F | Tank Capacity: 1/2 gallon | Discharge: 3/8 inch | Barb. Frequency: 60 Hz | Motor Overload Protector: Yes | Amperage: 1.45 A | Watts: 80 W | UL Listed: Yes | Motor Horsepower: 1/10 HP | Voltage: 115 VAC | Dimensions: 5 inches wide x 11-1/4 inches long x 7-1/4 inches tall.

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Modern Radio Reception (Classic Reprint)

200mm Ferrite AM Antenna Bar Allows For Best AM Reception, 10 Memory Preset Stations (5 FM, 5 AM).
PLL Synthesized Tuning System for Excellent Reception and Stereo Audio Performance.
Alarm by Radio or HWS (Humane Wake System) Buzzer and Sleep Timer.
Includes Switching AC Adapter 100-240V, 50/60Hz.
Easy to Read LCD Display with Backlight and Battery Power Indicator.
TUNER: FM – Frequency (megahertz) = 87.5 – 108. Frequency (kilohertz)= 522 – 1629 (9k)/ 520 – 1710 (10k).

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Amrex 2\x2\ Sponge Insert Replacements From Caputron (10 Inserts/Pack)

Design The Output Contact Adopts Relay, Which Can Withstand Large Output Current, And Can Set System Parameters According To The Button, So As To Meet The Application Of Different Occasions..
Characteristics Dc20D Is One Module Used For Diesel Engine Or Generator. The Status Of The Engine And Generator Can Be Checked Conveniently..
MultiFunctional It Is With The Functions Of Auto Start/Stop, Protection And Alarm Indication. Dc Power And Running Situation Is Indicated On The Front Panel..
Easy To Use Add Current, Speed Measurement Display Function, Add Rs485 Interface, Can Be Connected To The Computer..
Good Effects Over Frequency, Low Frequency, Over Voltage, Under Voltage, Low Oil Pressure, High Temperature, Low Water Level, Low Oil Level, Charge Failure, OverTime Stop, Emergency Stop Alarm System As Well As Low Battery Voltage Can Be Indicated In Time..

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QPKING Electric System Circuit Tester,Automotive Electrical System Tools,9V-30V Electrical System Diagnostic Tool With 2.4-inch LCD Display

...ly test and automatically identified the Voltage, resistance, Positive and Negative poles of the tested component, which brings the user a lot of conveniences..
[Oscilloscope Mode&Relay Test]: Car Electric System Tester is not only able to display the parameter curve diagram of the tested component, such as voltage, frequency, time, etc, but also can test the common automotive relay, like 5-terminal relays, and 4-terminal relays..
[Component Activation&Injector Mode]: It can generate "Active" signals for components, such as lights, motors, and other on-board electronic devices. Also different pulse signals can be output to the injector, which provides 4 pulse modes to better detect the condition of the injector..
[0-5V Power Supply&Voltage Alarm]: Capable of setting 0-5V output voltage, used to verify the wiring condition of the tested component. Equipped with voltage setting alarm. If a short circuit or fault causes the voltage to be greater than or less than the set value, the device will alarm..
[Multi-language Feature]: 14 languages supported, English, Spanish, German, Russian, Italian, Polish, Portuguese, French, Vietnamese, Malaysian, Filipino, Indonesian, Arabic and Thai..

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Supplying Demand CP230 SPCP230 HVAC Condensate Pump 230V with Audible Alarm

This pump is designed to remove condensate from AC systems, condensing furnaces and boilers, ice machines, drinking fountains, and coolers. These pumps incorporate an audible alarm, and an overflow switch that can be used to shut down the system..
Motor Horsepower: 1/10 HP | Voltage:208 / 230 VAC | Watts: 75 W | Amperage: .72 A | Frequency: 50 / 60 Hz | Motor Overload Protector:Yes | Height Total: 7.25" | Length Total: 11.25" | Width Total:5" | Tank Capacity: 1/2 Gal. | Discharge: 3/8" Barb | Maximum Temperature: 110° F | Alarm Sound Level: 80 dB.
22 feet of standard lift @ 10 GPH | Independent NC safety switch & motor switch | Suitable for acidic condensate | 1/4" quick connect terminals | 3 terminals provided for easy connection.
Independent NO audible alarm switch rated @ 80 dB | Specially designed leak-free motor and safety float | 3/8" rubber ball check valve.
Vibration absorbing feet | Metal side mount tabs, 11.5" on center | 3 inlet holes | 6 foot power cord included.

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