GSM-RELAY ( gsm реле) Seven relay output GSM remote control switch (gsm controller)(relay control switch)
GSM Gate Opener, GSM Remote Control Relay Switch, Automatic Remote Access Controller, Garage Door Automatic Controller - - Amazon.com
Seven relay output GSM remote control relay switch box (QUAD band) New version Support DTMF - Price history & Review | AliExpress Seller - Shanghai Wafer Microelectronics Store | Alitools.io
2 input,1 output RTU 5015 GSM Remote relay control board gsm gate opener Backup battery supported for power off alarm with app - Price history & Review | AliExpress Seller - Shop1779188 Store | Alitools.io