PAU82C(with CD), PAU82R(with recorder)  Freq range: UHF70-900MHZ  Freq stability:±0.005%  Modulation(max): 20KHZ  Freq resp: 50HZ--18KHZ±3db  SNR:≥min 100db±3bd(RF=1mv)  Distortion:≤0.5%(at 1khz)  Built in battery: 6V 3A  Receiving mode: quartz control type  Sensitivity: 10db/uv(S/N 60db)  Output: unbalanced 250mv, 600ohm  Speaker: dual cone, full freq  Power output: 50W (max)  Size: L320 x W265 x H545