Rolton W405 Portable Mini FM Radio TF Card USB Receiver Music Player with LED Display 1. Output power: 3W 2. FM radio frequency range: 76MHz-108MHz 3. Working voltage: DC 3.7V 4. Charging voltage: USB input DC 5.0V 500mA 5. Lithium battery capacity: 1500 mAh (Battery not included) 6. Basic function: MP3 playback 7. Interface type: AV 8. Input voltage: 220V 9. Supported format: TF card 10. Speaker: 1.5 inches x 1 + passive radiator x 1 11. Playable formats: MP3, WMA, WAV 12. Audio classification: Card-based player 13. Speaker box material: Engineering plastic 14. Channel: 2 15. Expansion interface: USB 16. Input voltage: 220V 17. Impedance: 0.45 ohms 18. Playable formats: MP3, WMA, WAV 19. Dimensions: 123x32x67 mm 20. Net weight: approximately 158 grams 21. Play time: up to 8 hours 22. Extended storage support: up to 32GB 23. Bluetooth version: 2.1 24. Speaker effect: 3D surround sound Packing list: 1. Device x 1 2. Lanyard x 1 3. USB charging cable x 1 4. User manual x 1 5. Certificate of conformity x 1