Product Review

Govee Wireless Door Open Sensor with Chime, Take Care Of Your Family and Business
Mount the door sensor on the door and plug receiver into any standard outlet, and this door entry alarm is ready to work. When the two parts of the door alarm sensor are separated, door sensor will be triggered, then the receiver will get signal from the sensor For home security, you can get alert when deter break-ins or children/pets coming out.
For business use, ensure never miss a customer when they come

Specifications:
Operating Range: 330ft (100m in open area)
Volume Range:110-80-60-40-0 dB
Chime Option: 36 Chime Options
Plug- in Receiver Voltage: AC 110~240V
Working Frequency: 433.92+-0.5Mhz
Sensor Battery: 2*12V 23A(Included)
Battery Time: About 12 months(Depend on the Triggered frequency)

Package Contents:
1* Door sensor
1 *Receiver
1 * User Manual
2* 3M Tape