◎ LCD display.
◎ With tamper alarm, when enter wrong password, it will limit times.
◎ Self-checking periodicity.
◎ Can program the alarm panel.
◎ Work with alarm panel in 2-way communication.

Model	PB-502R
Working voltage	3.7V/1200mA
Standby current	≤60uA
Working current	≤25mA
Transmitting distance	75m（open air）
Transmitting power	12Db
Transmitting frequency	433MHz/868MHz