Operation mode: GSM 850/900/1800/1900MHz, 2G/3G/4G card can be used and can be connected to a variety of communication products. Connection method: RJ-11 phone line jack, plug and play, no need to adjust. With 9 LED indicators, signal display, call status display. Function: The Phone Box can use the GSM network to quickly provide fixed wireless telephone communication services and data services within GSM cellular network coverage. 24 hours work, built-in automatic guard dog detection, avoid accidents, avoid accidents, avoid missed calls. Purchase Note: 1 * Box Host, 1 * Phone Cable, 1 * Power Cord, 1 * Antenna, 1 * User Manual. Please note that the new type and old type of this product will be sent randomly, and make sure you don't mind before ordering. Specifications: Plug: EU Weight: 410g Host Size: Approx. 16 * 10 * 3cm / 6.2 * 3.9 * 1.1in Antenna Length: 280cm Antenna Height: 20cm Phone Cable Length: 145cm Color: White Operating Mode: GSM 850/900/1800/1900MHz, 2G/3G/4G card can be used and can be connected to a variety of communication products Peak Power: 2 W Power consumption: static 80 mA/1350 mA, emission 600 mA Sensitivity: -104 dB Internal voltage: DC 5C/12V/1.0 A Ambient temperature: -10°C to +40°C Operating humidity: 45%~90% Air pressure: 86 to 106 Pka Ambient noise: <60 dB Antenna overflow: 3.5 dB (omnidirectional), 12 dB (directional/optional) Power supply: 110V/220V AC ± 10%, frequency 50Hz/60Hz Connection Method: RJ-11 phone line jack, plug and play, no need to adjust Antenna Connection: SMA Skyline Antenna Connector: Stick Antenna Packing List: 1 * Box Host 1 * Telephone Cable 1 * Power Cord 1 * Antenna 1 * User Manual