1. Fashion and environment design 2. Built-in rechargeable lithium battery 3. SD/USB/TF/FM 4. ODM OEM Android ... :> 85dB 6, Charging power: USB 5V 7, Power supply: 550MH Lithium battery Packing Details: >> 50PCS/CTN >> Product Dimensions: 100*55mm>> Box ... -quality aluminum and iron boron speaker. 9. Built-in rechargeable lithium battery, when the maximum playing, support for 5 hours. Android ...