Item number:QYT 8900dFrequency Range: VHF: 136-174MHz UHF: 400-470MHzNumber of Channel: 200Channel Spacing: 25KHz 20K 12.5KPhase lock step: 2.5KHz, 5KHz, 6.25 KHz, 10 KHz , 12.5 KHz, 25 KHzWorking Voltage: 13.8V DC15%Squelch way: CTCSS/DCS/5Tone/2Tone/DTMFFrequency Stability: 2.5ppmOperating