BS-28E RGB Colorful Atmosphere Light Bluetooth Speaker 1. Bluetooth version: V5.0 2. Use transmission power: 1.49mW 3. Transmission frequency: 2.48GHz 4. Transmission distance: 8-10m 5. Music playback time: about 3 hours 6. Charging time: 2-3 hours 7. Standby time: 240 hours 8. Battery: 3.7V2000mA 9. Charging voltage: DC 5V1A-2A 10. Charging socket: Micro 5Pin (V8) 11. Speaker power: 5W×4 12. Support TF card, U disk 13. Audio input supports 3.5mm audio input 14. Support coaxial IN jack and infrared receiving port (with remote control) 15. This product has its own radio function and does not support hands-free 16. Colorful lights follow the rhythm of the sound to make music and games more atmosphere 17. Support Bluetooth 5.0 wireless connection, high-efficiency and stable wireless transmission, get rid of the shackles of wired 18. Four speakers + air duct design, shocking bass HiFi sound quality brings you a different auditory feast