SURFOU Wireless Door Alarms Chime, 1000FT Range 55 Ringer 5 Volume, Easy to Install, IP55 Waterproof -1 Sensors 1 Receiver

Additional Details from the Manufacturer

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More features

• Wireless Sound Contact Bell Alert Security Sensor - Open Door Alarm System For Business When Entering, Kids Safety, Home, Office, and More
• Simply plug the receiver into any standard outlet and use the double-sided adhesive tape provided to attach the door sensor to your door or window. Remove the insulating paper from the sensor before use
• This child/ home door sensor alerts to helps deter break-ins(entry alert chime activates when magnetic sensor separates)
• This wireless door open chime is up to 1000ft in open area, IP55 Waterproof
• 55 Ringer 5 Volume from 0-110dB. The built-in memory chip remembers your last setting tune without having to reset it after a power failure
• You can add multiple SURFOU receivers and transmitters of the same model to expand your door chime system