... -in CTCSS/ DCS2, Chinese/ English voice prompt3, 16 storage channels4, H/L power selective5, TOT function6, Busy channel lockout7, FM radio8, VOX function9 ... Hum & Noise45dB at 25KHzConducted/Radiated Emission-36dBm < 1GHz, -30dBm > 1GHzAdjacent Channel Power< -65dB at 25KHz, <65 at 12.5KHZAudio Distortion< 5 ... damage on the way .photos: new design wireless tour guide system MYT-650