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

- 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. - One output with relay rating 3A/240VAC for connecting the switch of the door or machines.