No need to provide remote controls or buttons for different users. Programmable Relay Controller GSM Gate Opener, GSM Remote Switch Door Access Control System Programmable Remote Control SIM CARD SUPPORT: No call charges, relay switch receives calls from authorized numbers and then performs the switch operation on the first ring. Can be operated anywhere, no distance limitation; Use caller ID, unknown callers are automatically ignored. Detecting the status of the door at all times and alarming for illegal intrusion; REMOTE CONTROL: Smart garage door controller with remote switch, easy APP control operation, for making free authorized calls, can be operated from anywhere, no distance limitation, can be used for global network. Based on GSM network with wide range of applications; Relay or open time is programmable. Discover smart GSM gate opener with 4G/2G SMS remote control, CE-certified safety, and modern design for automatic gate opener applications King Pigeon RTU5024 Gsm Relay Sliding Gate Opener ... – Grandado SMS Smart Alert: Built-in 2-channel digital input, when any one of them is triggered, it will send a reminder SMS to the specified number and activate the siren immediately: protect your assets via GSM network. 4G LTE GSM Gate Automation Door Entrance Relay Switch RTU5024 - Enerna Relay operation returns SMS confirmation to or authorized phone, this feature can be passed with no call charges. SIM CARD SUPPORT: No call charges, relay switch receives calls from authorized numbers and then performs the switch operation on the first ring.
