◎ 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 (RD)
Working voltage：3.7V/1200mA
Standby ：≤60uA（working≤25mA）
Wireless distance：75m（in the open air）
