IP-67 Waterproof and Dustproof 1 Meter Depth for 30 Minutes Float Class D DSC Call Auto-answer Dual/ Tri Watch Favorite Channel Set Vibration Draining External GPS Receiver Scan Resume Timer Weather Channel with Weather Alert Built-in DSC MMSI Code General Specification Frequency Range TX,156.025-157.425MHz RX,156.050-163.275MHz RF Power 25W/1W Type of Emission FM,16K0G3E,,DSC,16K0G2B, Frequency Stability 10 PPM Power Supply DC13.8V (15%) Operating Temperature -20~ +60 Antenna Impedance 50Ω Dimensions (WHD) 153mm 67mm 152mm Weight 742g