RoamEO GPS Pet Location System - Product Specifications System Power Handheld Unit Battery: Lithium Ion Battery Pack, 1800 mAH, 4.2V Collar Battery: Lithium Ion Battery Pack, 780 mAH, 4.2V Handheld Unit Battery Life: 8 hours typical, use dependant Collar Battery Life: 10 hours typical, use dependant Handheld Unit Charger: 5VDC @ 2.0A Collar Charger: 5VDC @ 700mA Charging Time: Approximately three hours Physical Dimensions Handheld Unit: 4.4" Wide x 5.6" Height x 1.3" Depth Collar Case: 2.3" Wide x 1.0" Height x 1.6" Depth Receiver Weight: 8.65 oz (245g) Collar Weight:      Collar and plastic case: 3.70 oz (106g)      Plastic Case only: 2.10 oz (60g) LCD Display: 2.2" H x 2.9" W      320 X 240 pixels      256 color, transmissive TFT Collar Case: Water resistant to 1m Temperature Range: -10 degrees - 60 degrees Celsius Electronic Compass Accuracy: +/- 5 degrees Resolution: 1 degree GPS Performance Receiver: WAAS-enabled, continuously tracks up to 12 satellites Acquisition times: Cold: 42 seconds Warm: 20 seconds Update rate: Once per second, continuous GPS Accuracy: < 5.2 meters, 95% typical Antenna: Patch Radio Features Transmit Power: 2W Channel: MURS band, 154.60 MHz Range: up to 1 mile Tracking Information Quantity: track up to three units simultaneously Information: displays distance from base and velocity