Output power: left track right sound channel 3 W * 2 (4 Ω) 1, digital active speakers 1 1, with FM function input sensitivity: more than 400 mV 2, 1 2, audio connections with the players, support TF card, USB card, can play MP3, WMA music format. SNR: frequency 82 dB 3, product description article 1 3, with desk lamp function distortion rate: 0.7% or 4, product certificate a 4, perfect sound: low frequency low forceful. Intermediate frequency full circle