Specification Size 39*56*12mm Working voltage dc:6~30v Input fuse 2a Working temperature -40~85 Humidity 10% to 90% Cpu mt6223(52mhz) Gsm module Band:850/900/1800/1900mhz Tally with: gsm phase 2/2+ -class 4 (2w @ 850/900mhz) -class 1 (1w @ 1800/1900mhz) Gprs multi-slot class 12 Gprs mobile station class b Max rf output: 33.0dbm2dbm Dynamic input range: -15 ~ -102dbm Receiving delicacy: class rber2%(-105dbm) Frequency stability: > 2.5ppm Max frequency deviation: 0.1ppm Rms deviation:5deg Gps module Gps chip set: jrc g591b Frequency: l1, 1575.42 mhz Number of channel: 22 Gps sensitivity:-164dbm Positioning accuracy: 2.5m Reacquisition: 0.1 sec, average Hot boot: 2 sec., average Warm boot: 38 sec., average Cold boot: 44 sec., average Altitude limit: 18000 m Velocity limit: 515 m/s I/o port 4 i/o cables 1. Positive 6v-30v. Red wire 2. Negative. Black wire 3. Remote cut off engine power. Yellow wire 4. Acc, engine start detecting. Green wire Current Standby current:16ma Working current:60~150ma Charging current: max