Q3 3D surround sound Power supply: lithium battery,Features: 3D-Sound, Audio size:79*42*90mm，Audio material: Zinc alloy supports TF card with a maximum capacity of 32G.Support lossless format, MP3/WMA and other music formats. Support USB sound card function, card reader function, support stereo headphone output, wireless Bluetooth hands-free and music transmission. Swail® design and Manufacture.