... .Built-in battery during power failure Two network PSTN and GSM alarm system 1. Large LCD English blue back-light display, ... RoHs and CCC certificate. Our main products are Home PSTN/GSM Security Alarm System, 3G Alarm System, GSM Power Alarm, Video Monitoring system, ... /Gas/PIR Motion/Door sensor and so on. We can also research and develop wireless remote control system based on clients’ needs, ...