Function: card, radio, voice prompt, call function Type:Bluetooth Speaker Connection method: Bluetooth connection Interface Type: USB Frequency response range: 280HZ-16KHZ Signal-to-noise ratio: 75dB Power supply mode: built-in lithium battery Playing time: 6~8 Effective distance: 10 meters Operation mode: button Applicable people: general Playback format: MP3, WMA, WAV, FLC Shell Material: Plastic Supported formats: TF card Speaker adjustment method: button Box material: wood Dimensions: 160mm*110mm*75mm Built-in battery capacity: 1200mAh-2000mAh Battery capacity: 1500MAH [Sale Guarantee] - If you have any questions about the product, please contact us, our professional customer service team will solve the problem for you as soon as possible.