2G/3G/4G RTU5024 GSM Gate Opener Relay Switch Wireless SMS Call Remote Control Gate Door Opener Free Call for Access Control ,Long Lasting

*Secure - Using caller-ID for identification, unknown callers are ignored. *Add or remove users by SMS Text command. *No need to provide a remote control or keys for different users. *Up to 200 authorized phone numbers can be configured at the specified time. *The relay action will return a SMS confirmation to the owner or authorized call in number, this function is editable by user. *The relay close or open time is programmable.