Mini And Compact Design Makes It Easy To Carry Along Anywhere You Travel. Tf Card Music Player: Built-In Tf Card Read-Only Decoding And Allso Have Mic To Speak While Conected On Phone Or Calling And Equipped With 2200 Mah Built-In Rechargeable Battery.Provides Non-Stop Entertainment For Over 1-3 Hours Once Fully Charged Bluetooth:-Wireless Music Streaming Via Bluetooth 2.1 Or Below. Bluetooth Range: Line Of Sight, 10M Or 30Ft,Easy To Connect By Bluetooth.