Physical features of GSM / GPRS+GPS Module (SIM508C): 
                   · Overall dimensions: 50mm x 33mm x 6.2mm
                   · Normal operation temperature: -30°C to +70°C
                   · Restricted operation temperature: -35°C to -30°C and +70°C to +80°C
                   · Storage temperature: -40°C to +85°C
                   GSM/GPRS specifications:
                   · Dual-Band 900/1800MHz or Quad-Band 850/900/1800/1900MHz
                   · Control via AT commands (GSM 07.07 and 07.05 and SIMCom enhanced AT 
                   commands) 
                   · Supply voltage range: 3.4V - 4.5V
                   Specifications for GPS: 
                   · Receiver 12 channels, L1 1575.42MHz, C/A code 1,023MHz chip rate
                   · Acquisition rate (TTFF defined at 95% of first position local station)
                   Hot start < 1s, average, open sky
                   Warm start < 35s, average, open sky
                   Cold start <35s, average, open sky
                   Support AGPS
                   · Operating voltage 3.3V DC ±5%
                   · Low power consumption about 160mW at 3.3V (Full power) 
                   · Protocols
                   NMEA-0183
                   SiRF binary
                   RTCM SC-104
                   · Crystal oscillator (TCXO), temperature compensated with frequency stability of ±
                   0.5ppm
                   · Memory: On-chip 4Mbit FLASH and 1Mbit SRAM

Detailed Introduce:
                   Physical features: 
                   · Overall dimensions: 34mm x 55mm x 3.0mm
                   · Weight: approx.12g
                   · 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
                   GSM/GPRS specifications:
                   · Tri-Band 900/1800/1900MHz or Quad-Band 850/900/1800/1900MHz
                   · GPRS multi-slot class 10/8
                   · GPRS mobile station class B
                   · Compliant to GSM phase 2/2+
                   -Class 4(2W @ GSM 900MHz)
                   -Class 1(1W @ GSM 1800/GSM1900MHz)
                   · Control via AT commands (GSM 07.07 and 07.05 and SIMCom enhanced AT 
                   commands) 
                   · SIM application tool kit
                   · Low power consumption
                   · Supply voltage range: 3.4V - 4.5V
                   Specifications for GPS: 
                   · Receiver 20 channels, L1 1575.42MHz, C/A code 1,023MHz chip rate
                   · Accuracy Position 10 m CEP
                   without SA/Velocity 0.1m/s
                   without SA/Time 1μs synchronized to GPS time
                   · DGPS accuracy 1 to 5m, typical, 0.05m/s, typical
                   · Date WGS-84
                   · Acquisition rate (TTFF defined at 95% of first position local station)
                   Hot start < 1s, average, open sky
                   Warm start < 38s, average, open sky
                   Cold start < 42s, average, open sky
                   · Operating voltage 3.3V DC ±5%
                   · Low power consumption about 160mW at 3.3V (Full power) 
                   · Protocols
                   NMEA-0183
                   SiRF binary
                   RTCM SC-104
                   · Crystal oscillator (TCXO), temperature compensated with frequency stability of ±
                    0.5ppm
                   · Memory: On-chip 4Mbit FLASH and 1Mbit SRAM