RTU5024 GSM Gate Opener Relay Switch Wireless Remote Control Door Access Door Opener Free Call 850/900/1800/1900MHz ,Easy Operate

- Can be operated from anywhere, no distance limit. - Quad-band, can work in the worldwide GSM Networks. - No need to provide a remote control or keys for different users. - Secure - Using caller-ID for identification, unknown callers are ignored. - Up to 200 authorized phone numbers can be configured at the specified time.