UHF PLL 2*32 dual channels wireless amplifier teaching system Tone-lock,60-100meters Specifications:Frequency response: 50Hz~15KHz±3dBInput Sensitivity:1.5mV (Mic 1,2) 150mV (Line)S/N:>65dB ( ... volume control for each input 4, with 2 stereo line input 5, with 2 *32 channels UHF PLL TONE-LOCK wireless microphone module 6,power out :30W×2 UHF PLL 2*32 dual channels wireless amplifier teaching system