TY-B04 is mini portable speakers, which not only support lossess audio formats, like WAV, FLAC, APE but also the high compression rate audio such as WMA, MP3, AAC & etc. What's more, the barrier-free transmission distrance of TY-B04 is within 15m, which offers you more freedom in connection. TY-B04 also has rechargeble built-in batteries, which can works for as long as 8 hours. As a top 10 audio brand in China, Tonewinner has 30+ years experience in designing and manufacturing acoustic products. As an original supplier, Tonewinner always warmly welcomes distributors, partners and customers around the world.