Fangrui Product Details 1. Power: 8w 2. Battry Capacity: 4600mah 3. Charging Time: 4h 4. Working Time: 2-3 Hours 5. Life Time: Up To 15 Hours 6. Playback Mode: Support Usb Flash Drive Playback And Tf Card Playback 7. Tips:it Is Wired Or Wireless Version.except For The Microphone Connection Way, Other Functions Are All The Same. 8. How To Use: 9. Place The Microphone In Front Of Your Mouth To Obtain The Maximum Amplification Effect. 10. Do Not Whistle: Keep A Certain Distance Between The Microphone And The Speaker, And Preferably Facing Each Other. 11. Put On A Headset, Hang The Amplifier Speaker On Your Waist, Then Turn It On, And Finally Gradually Increase The Volume As Needed. 12. Colour:white 13. Material:plastic 14. Specification:a:wireless 15. Package Contents: 16. 1 X Voice Amplifier 17. 1 X Headset Microphone 18. 1 X Usb Cable 19. 1 X Waist Belt 20. 1 X Wireless Receiver 21. Only The Above Package Content, Other Products Are Not Included. 22. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.