Feature: 1. Built-in 3G module, compatible with GSM version. It can be used for authorized access control, door control, remote device switching, parking system, etc., and it can also be used in places where systems, machines, and equipment need to be opened/closed remotely. You only need to make a free call from your mobile phone. 2. Up to 99 authorized phone numbers can be configured. Just dial the authorized user number to open the switch card and door, open or close the machine by the door opener. There are no call charges. 3. The 3G/GSM door opener rejects the call from the authorized number, and then performs the switch action on the first "ring". Use the caller ID for identification and ignore unknown callers. 4. It has a wide range of applications and can be used for doors, bollards, guardrails, garage doors, shutters, doors or machines, and can be operated from anywhere without distance limitation. You can add or delete users through simple SMS text commands. 1 relay level 3A/240V AC output, used to connect door or machine switch. 5. 2 digital input door sensors, motion sensors or other sensors protect your door and window, when any one of them is triggered, it will immediately send SMS to remind you. The relay action will return SMS confirmation to the user, this function can be edited by the user. Specification: Item Type: 3G/GSM Gate Opener Material: ABS Plastic DC Power Supply: 12 V / 2 A Power Consumption: 12V input (50mA) SIM Card: Support 3V SIM card Antenna: 50Ω SMA antenna interface Temperature Range: -20-60°C Humidity Range: Relative humidity 90% (no condensation) Relay Class: 3/240 V AC Size: Approx. 110x90x25mm/4.3x3.5x1in How to Use: 1. The product needs wiring 2. Insert a 3G mobile phone card into the product 3. Connect with mobile phone 4. The product can be controlled by mobile phone. Package List: 1 x 3G/GSM Gate Opener1 x Antenna1 x USB Programming Board1 x USB Cable1 x Manual Note: The corresponding operating frequencies are as follows, please confirm the required frequency before purchasing:European Version: UMTS: 900/2100MHz, GSM/EDGE: 900/1800MHzUS Version: UMTS: 850/1900MHz, GSM/EDGE: 850/900/1800/1900MHzAustralian Version: UMTS: 850/2100MHz, GSM/EDGE: 850/900/1800/1900MH