... 3.Size: 25.4*25.4*3. GPS GSM tracker module with Low Price, High Performance, International Approvals ... Power: 1).Input power input:3.3V DC for main power and RTC power 2).Input current ... , GSA, GSV, RMC (VTG ,GLL and ZDA for optional)) 3).SiRF binary:position, velocity, altitude, status ... the pulse positive edge 4).Measurements Aligned to GPS second, ±1 microsecond 12. Environmental Characteristics: 1 ...