Built-in Lithium-ion battery;Power Supply:Lithium-ion,Computer-USB-in,DC-in Compatible Micro SD/TF/U- ... Lithium-ion battery;Power Supply:Lithium-ion,Computer-USB-in,DC-in2.Compatible mobile/computer/MP3/MP4,,Compatible Micro SD/TF/ ... 18KHz,SNR≥80db 7.Built-in FM Radio,radio module,automatic atation search,pristine sound quality,easy to use 8. ... :46*36*30cm *pcs/ctn:60pcs,19KG Music speaker for computer