Feature:1. Built-in 3G module, compatible with GSM version. With remote switch function, call through authorized phone, can be operated from any place, there is no distance limit, and up to 1000 authorized phone numbers can be configured within a specified time.2. High security, use caller ID for identification, unknown callers will be ignored. Built‑in rechargeable battery for power failure alarm.3. You can add or delete users through SMS text commands. There is no need to provide remote controls or keys for different users. A wide range of applications, including doors, bollards, fences, garage doors, shutters, and doors or machines.4. The relay switch will return the SMS confirmation to the owner in the number or authorize the call. This function can be edited by the user. The switching time of the relay is programmable.5. There are no phone charges. After receiving a call from an authorized number, the GSM trunk switch will turn on/off the first .Specification:Item Type: Gate OpenerMaterial: ABS PlasticModel: RTU5024Digital Output: NC/no dry , 3A/240VACDC Power Supply: 9-15VDC/2APower Consumption: 12V input maximum 50mA / Average 25mASIM Card: Standard SIM cardAntenna: 50Ω SMA antenna interfaceTemperature Range: -20- 60°CHumidity Range: 90% RHBattery Capacity: 1000mAh (Built-in)Size: Approx. 3.23x2.99x1.06in / 82x76x27mm Package List:1 x 3G/GSM Gate Opener1 x Antenna1 x USB Data Cable1 x USB Programming Cable1 x User ManualNote:Please distinguish the corresponding frequency before placing an order:European frequency: UMTS:900/2100MHz, GSM/EDGE: 900/1800MHzAmericas frequency: UMTS:850/1900MHz, GSM/EDGE: 850/900/1800/1900MHzAustralia frequency: UMTS:850/2100MHz, GSM/EDGE: 850/900/1800/1900MHz