2G 3G GSM Gate Opener Relay Switch Phone Wireless Remote Controller Door Access Wireless Opener By Free Call RTU5024/RTU5035 ,Easy Operate

- Add or remove users by SMS Text com mand. - The relay close or open time is programmable. - 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.