The GSM Mobile fax machine OEF2218ES based on the GSM Network. It can be used in wireless (GSM) or wire (normal telephone line) situations. There are 3 types of power supplies for this model. 1. 110v-220v Ac power adapter (optional adapter) 2. DC12v power line(for vehicle) 3. Standing by 24 hours rechargeable battery(optional adapter) The specification of this model is as follow: TYPE Portable Facsimile TRANSMISSION STANDARD Compatible to ITU-T G3 standard APPLICABLE LINE GSM and PSTN/PABX TRANSMISSION SPEED 9600/4800/2400bps (WIRELESS) 14400/9600/4800/2400bps (WIRE) SCANNING MODE CIS SCANNING RESOLUTION Fine7.7Line/mm Standard 3.85line/mm RECORDING MODE TPH THERMAL PAPER SIZE 210mm/216mm�30m IMAGE HALF-TONE 64 level CID NUMBER 30 POWER AC 110V^220V DC +12V/10A RECHARGEABLE BATTERY WORK TEMPERATURE 5^35 STORE HUMIDITY 20%^80% DIMENSION 285mmW �188mmD �78mmH WEIGHT 1.5 kg (main body