Features: Sirfstar chip 12 channel1) Input voltage: +4.95 - +5.5V DC 2) Backup battery: 3V rechargeable lithium cell battery 3) Tracks up to 12 satellites 4) Update rate: 1sec 5) Acquisition time (average): a) Hot start: 8sec b) Warm start: 38sec c) Cold start: 48sec 6) Position accuracy: position: <10m, 90% 7) No SA Velocity: 0.1m/sec 8) No SA Time: 1sec synchronized GPS time 9) Dynamic conditions: altitude: 18,000m 10) Max. velocity: 515m/sec (1,000knots) 11) Max. acceleration: 4G producing area:China