BT01 Retro Bluetooth Wireless Mini Speaker Portable Radio Support TF Card(Blue) Filter-Audio Signal Switcher On / Off mode: Remove

On / Off mode: Remove / install the battery

mobile hard disk and other peripherals to improve office efficiency

play or pause music

and high safety

Black Shark 3S

BT01 Retro Bluetooth Wireless Mini Speaker Portable Radio Support TF Card(Blue) Filter-Audio Signal Switcher On / Off mode: Remove1. Bluetooth version: 4. 1 2. Play format: MP3, WMA, WAV 3. Support format: TF card 4. Charging input: USB DC 5V 1 2A 5. Battery capacity: 1200 mA 6. Frequency response range: 100Hz 20KHz 7. Output power: 5W 8. Charging time: about 2 3h 9. Play time: about 6h 10. Expansion storage: 32GB 11. Effective distance: about 10 meters without barriers 12. LED indicator description: blue light flashes (to be connected), blue light is on (connected), red light