1、Remote Controlling: Adopt Gsm or 3G network communication, not limited by the distance. Adopt Sms remote setting parameters, easy to operate and use. Built in rechargeable backup battery to ensure work normally even the power outages. 2、Solid Housing: This Gsm gate opener is made of premium metal material, which is sturdy and durable. And it has IP30 waterproof level, which can prevent raining. 3、Multiple Applications: Suitable for doors, garages, car parks, control rooms, warehouses, industrial sites, household appliances, access control, dropper, valve, gate and other remote control places. 4、Timing Function: You can set the time of opening and closing in the according to your requirements and use this relay remote control switch to make your door smart. 5、High Security: You can also authorize someone to open the door for a certain period of time, after which he can't call the door. A maximum of 200 authorized phone numbers can be configured at a specified time.