Features: o With 4-port SIM card for GSM networks o Built-in Siemens industrial module in GSM 900/1800MHz o Simple to install and easy to maintain o Allows pin code entering and reciprocal phone card lock o Polarity reversal signal for metering o 3.5dBi gain antenna o Compatible to PABX and PSTN (optional) o Supports caller ID and handsfree o Incoming number,dialing number bar,and unbar enable o Cost rate setting enable Specifications: o Networks support: GSM 900MHz/1800MHz o Operation temperature: -10 to +45 degree Celsius o Power supply: AC 110-230V o Sensitivity: -104dB o Standby hours: 48 hours o Talk time: 2 to 6 hours o Charging time: 6 hours o Peak power consumption: 2W o Connectors: SMA antenna connector (TNC optional) o Atmospheric pressure: 86 to 106Pka o Power consumption: static ≤25mA, emission ≤500mA o Antenna: Gain: 3.5dB (all directional)/12dB (certain/selection)