Repeater,two way radio,mobile radio,professional radio,microphone,earphone,VHF/UHF Radio Frequency:135-175MHz 400-475MHzSpacing: 5,10,12.5,25 kHzChannel numbers: 128 channelsCTCSS: 50 groupsDTMF coding: 16 key toneFrequency stability: ±5ppm(-15°C~+60°C)Modulation: 16F3Working: single-duplex in same & different channelAntenna impedance: 50ΩTransmitting power: L:5W H:30WSpurious & harmonics: ≤- ...