Ⅰ. Product Description: Security RTU5024 GSM Gate Opener Controller Door Access Switch Free Call Relay Wireless Remote Control for Home Bedroom DecorationsRTU5024 GSM Gate Opener Wireless Relay Remote Control Door Access Switch Free Call 850/900/1800/1900MHz Ⅱ. Description: RTU5024 GSM Gate Opener is a GSM relay that can be used for authorized door entry, gate control, remote equipment and parking system switching. In addition, it can also be used in places where you need to remotely arm/disarm the system by using a free call from your mobile phone, callers are ignored - Up to 200 authorized phone numbers can be set at a specific time. (gates, bollards, barriers, garage doors, shutters and entrance doors or machines). Ⅲ. The relay operation will return an SMS confirmation to the owner or an authorized call number, this function can be edited by the user. Ⅳ. No call charges. GSM GPRS relay switch rejects the call from the authorized number and then performs the first ringing on/off action Ⅴ. Specification: GSM frequency: quad-band 850/900/1800/1900MHz; Gigabit output: dry contact NC/NO, 3A/240V AC; power supply: DCV1V; power: max. 50mA/average 25mA; SIM card: support 3V SIM card; Antenna: 50 Omega; antenna with SMA connector; Temperature range: -20 ~ + 60 ℃; Humidity range: 90% relative humidity; Size: 82 mm * 76 mm * 27 mm / 3.23 * 2.99 * 1.06 Ⅵ. Note: 1. There may be slight deviations in size due to manual measurement. Different measurement methods may not reflect the actual product. Ⅶ. X GSM Gate Opener1 X Antenna1 X User Manual Ⅷ. CE marking is a declaration by the manufacturer of the product that the product complies with the requirements of the European Commission Directives that apply to it.