Tri-Band GSM/GPRS 900/1800/1900MHz or Quad-Band GSM.GPRS 850/900/1800/1900MHz GPRS multi-slot class 10/8 GPRS mobile station class B Compliant to GSM phase 2/2+ – Class 4 (2W @ 900MHz) – Class 1 (1W @1800/1900MHz) Dimensions: 33mmx33mmx3.0mm Weight: 7.8g Control via AT commands (GSM 07.07, 07.05 and SIMCom enhanced AT Commands) SIM application toolkit Supply voltage range: 3.4V - 4.5V Low power consumption Normal operation temperature: -20°C to +55°C Restricted operation temperature: -30°C to -20°C and +55°C to +80°C Storage temperature:-40°C to +85°C