GSM fixed Fax Terminal voice/fax function IMEI changeable 1. Using SIM card and suitable for GSM850, 900, 1800, 1900MHz (optional). 2. Send/receive faxes through connecting to fax machine, except for making & answering calls after connection to telephone set. 3. Available to connect with telephone set, PBX, billing machine, etc 4. Available to connect with backup battery, and the stand-by time can reach 24 hours in case when The power is cut off. 5. Built-in PIN code protection featured with locking device/card/network 6. With LCD display to show caller ID 7. Optional to match with various high-gain antennas, featured with signal intensity indicator, Working status indicator, breakdown indicator, etc 8. Installed with IMEI changing function. Items Parameters Emission power 2W @ GSM850/GSM900MHz 1W @ DCS1800/PCS 1900MHz Working voltage AC220V DC12V Environment temperature -25¡ã C ~ -55¡ã C Humidity 10% ~ 95% . Package Dimension: 28cm*8cm*27cm.