otal output Power: 2 watt Device Size: 113*60*31mm Package Size: 209*52*86mm Net Weight: 0.275Kg Gross Weight: 0.775Kg System: Nextel,AMPS, TACS, NMT, GSM, DCS, CDMA, PDC, TDMA, PHS, IDEN,3G, UMTS,GPSL1 Built-in battery time : 90minutes Temperature: -10ºC to +50ºC Feature and Advantage: 1.Charging while working. 2. Each band can work separately or simultaneously. 3. Wind slots on two sides and inside coolers make a constant cooling working.