GSM Door Gate Opener Remote On/Off Switch Free Call SMS Command Support 850/900/1800/1900MHz

MJFVN

*Increased antenna control, more stable signal, security precautions no longer dropped. *850/900/1800/1900MHz quad bands, can work in the worldwide GSM networks. *No call charges. The GSM Relay Switch answers the call from authorized number then carries out the turn ON/OFF action on the first 'ring'. *Secure - Using caller-ID for identification, unknown callers are ignored. *Add or remove users by SMS Text command. Welcome and I wish you a happy life, my friend., Manufacturer: MJFVN