1. Gsm quad-band, can work in the worldwide 2g gsm networks.
2. No call charges, the gsm gate opener/relay switch rejects the call from the authorized number and then carries out the turn on/off action on the first "ring".
3. Multiple applications. (gates, bollards, barriers, garage doors, shutters, and access doors or machines)
4. Secure. Using caller id for identification, unknown callers are ignored.
5. Can be operated from anywhere, with no distance limit.
6. Add or remove users by SMS Text command.
7. Up to 200 authorized phone numbers can be configured at the specified time.
8. One output with relay rating 3a/240v ac for connecting the switch of the door or machines.
9. The relay action will return an SMS confirmation to the owner or authorized call-in number, this function is editable by the user.
10. The relay close or open time is programmable.
11. Based on gsm network, applied to many applications.
13. Smart phone app for configuration.
14.Voice trigger via iPhone(siri)