Charge3 Life Waterproof Bluetooth Stereo Speaker, Built-in MIC, Support Hands-free Calls & TF Card & AUX IN & Power Bank 1. Bluetooth V4.1 technology, up to 10m transmission distance. 2. Built-in Microphone: Supports hands-free calls. 3. Support TF card music playback, plug and play. 4. Support AUX Audio Function. 5. Life waterproof. 6. Up to 6 hours playing time. 7. Can be used as a power bank. 8. Output power: 2 x 10W. 9. Frequency response: 65Hz-20KHz 10. Signal-to-noise ratio:>=80dB 11. Battery: 3.7V, 6000mAh 12. Power supply: 5V2.3A 13. USB charge output: 5V2A(max) 14. Music playing time: up to 20 hours 15. Battery charge time: 4.5 hours 16. Supporting protocols: A2DP V1.3, AVRCP V1.5, HFP V1.6, HSP V1.2 17. Product size: 213x87x88.5mm 18. Product material: ABS+ silicone Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store