we manufactureinterphone,scrambler function,vhf radiowith multifunction and top quality.HLT-666Features:Output power 7W/2W range: 3-30km16(15+S)Stored ChannelsCTCSS/DCSDTMF/ VOX Functionscan channel /voice scramblerPC Programmablewire clone FunctionEmergency Alarm Function Chinese/English voice promptSpecification details:HLT-666Frequency Range136-174MHz or 400-470MHZFreq.CircuitPLL CircuitMODEF3EFormWith the frequently single worker or the different single worker frequentlyAntenna Impedance50ΩStep size25KHz / 12.5KHzDV VoltageDC 7.5V±15%Operation Temperature-25°C +55°CDistances3-30KM(Open ground)Channel No.16channel (15+S)Dimensions115(L)*59(W)*34(D)MMWeight198GInclude the lithium battery groupTransmitterPower Output7W/2WMoudulation Distortion<5%(300KHz-3KHz)Max.Freq.Deviation<±5KHzSpurious Radiation±2.5PPMFreq.Stability6dBTransmitting Current≤1300mA