Type:GPS Tracking Positioning Accuracy:10meters, 2D RMS Input voltage:DC 9V~36V/1.5A Back-up Battery:6800mAh/3.7V GPS Sensitivity::-158dB GSM Frequency:GSM 850/900/1800/1900MHz Velocity Accuracy:0.1m/s Microphone:With Voice monitoring function Velocity:515 meters/second (1000 knots) max Channels:20 channel all-in-view tracking Application:Real-time tracking/Voice monitoring/Vibration alarm /Demolition alarm Show More