Output power: left track right sound channel 3 W * 1 (4 Ω) 1, digital active speakers 1 1, built-in battery 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, FM function can choose distortion rate: 0.7% or 4, product certificate a 4, perfect sound: low frequency low forceful. Intermediate frequency full sleek, glittering and translucent get rid of high frequency, the overall elastic layers. Frequency response: 60 Hz-20 KHz 5, USB cable article 1 5, any audio link: MP3, iPod and PSP, CDS, DVDS, music mobile phones, computers, and a walkman. Speaker: step 6, 40 mm batteries a 6, LEA nondestructive energy amplification technology; Internal dynamic exchange natural cooling, highly stable. The power supply voltage: 3.7 V 7, unique shape