Model : CY-810 Frequency Range : UHF (420-470MHz) Communication Range: 2-7 KM Voltage : 3.7V Channel Capacity : 16 Antenna Type : External Product Size : 127x60x33MM Output Power : 5W Audio Power : 1W Battery Capacity : 2200mAh Weight : 216GM Warranty : 1 Year for Device 3 Month for Battery 1 Month for Charger Additional Features : Voice Prompt Battery Saving Low Battery Warnin