GSM Access Control
GSM Access Control is rugged and assembled with an aluminum case. The product is small and easy to install. It uses the GSM network.
GSM remote controller-3G full frequency
3G GSM remote controllers(SS1704) that are activated by calling or texting its mobile phone number. This will switch any device, it is connected to, on or off. There is no call costs incurred as the GSM controller will reject the call without answering.