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