PB-500R is wireless two way communication with wireless alarm panel ST-IVB model etc. It is China Focus brand high quality encryption wireless coding LCD keypad. Keypad is import part of home security alarm systems. It is set in bedroom, living room to enable easy query alarm system status, alarm zone information, get alarm information of time, location, burglar alarm, fire alarm, emergency alarm type. The keypad can be used to arm, disarm, emergency trigger the hooter etc. panel operation.