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MAIN FEATURES: Compatible with GSM 850/900/1800/1900 MHz Employ GSM network to cut cost of installing a land line. No more landline wiring, connect the telephone system to our GSM gateway, all your home/office incoming or outgoing calls would be transmitted via mobile GSM network. Transparent to your existing telephone system, therefore your existing telephone system will provides the same functions without further complex configurations. (e.g. incoming caller ID display, logs, speed dialing etc.) A directional higher gain antenna can be connected to solve the poor coverage problem No down time & providing a backup connection, even if your landline connection is interrupted, your telephone system could make calls or communications via the GSM network. GSM unit has a built-in rechargeable backup battery Easy to install and setup. SPECIFICATIONS: Power Supply: DC 12V 1.5A supply adaptor (with built-in rechargeable back up battery) Network Support: GSM 850/900/1800/1900MHz Standby Current: â¤ 25mA Emission Current: â¤ 600mA Power Consumption: 2W Receive Sensitivity: -104dB Antenna Increment: All directions: 3.5dB, Certain/Selection: 12dB AC power: AC220v 47-54HZ, AC110V 60HZ PACKAGE CONTENT 1 x GSM Gateway Main Unit 1 x Antenna 1 x 100-240V AC Power Supply with suitable pin configuration (depends on buyer`s address) 1 x English User Manual