BT01 Retro Bluetooth Wireless Mini Speaker Portable Radio Support TF Card 1. Bluetooth version: 4.1 2. Play format: MP3, WMA, WAV 3. Support format: TF card 4. Charging input: USB DC 5V1-2A 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 (charging) 13. Packing list: speaker x1, manual x1, charging cable x1 14. Shell material: plastic 15. Appearance size: about 9.5x7x6cm 16. Weight: about 170 grams Features: 1. Unique shape, small body shape, light and portable 2. After connecting with the mobile phone's Bluetooth, the speaker can be answered hands-free on the speaker when the call comes no matter in any playback mode 3. Support TF card within 32G, plug and play 4. 4.1 Bluetooth chip, fast transmission, low power consumption, effective transmission of about 10 meters without barriers, wide and stable signal, energy saving and durable, compatible with multiple devices 5. Built-in high-capacity durable polymer battery, long-lasting battery life, easy to use 6. Function button operation, simple and convenient