UHF PLL 2*32 dual channels wireless amplifier teaching system Tone-lock,60-100meters ... .5mV (Mic 1,2) 150mV (Line)S/N:>65dB (Mic 1,2) ; >75dB (Line) ; >105dB (Wireless Mic)T.H.D ... 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 ...