awei Y788 RGB Outdoor Bluetooth Speaker 1. Bluetooth chip: Jerry AC6966B 2. Bluetooth version: V5.1 3. Speaker size: 57x57mm 4. Battery capacity: 2400mAh/3.7V 5. Speaker power: 10Wx2 6. Sound channel system: dual speakers + diaphragm 7. Bluetooth working frequency: 2402MHZ-2480MHZ 8. Frequency response: 80Hz-18KHz 9. Frequency response: 60Hz-18KHz 10. Play time: 7.5-8h (70% volume) 11. Charging time: 3.5-4h 12. Waterproof level: IPX6 13. Handle design makes it easy to carry and hang on the wall 14. Playback method: Bluetooth connection, USB card , TF card, AUX 15. Support mobile phone battery indicator and connect Bluetooth device for stereo sound 16. Two machines can be connected in series wirelessly to form a 2.0 Bluetooth speaker effect.