1. Material: aluminum + plastic + with iron mesh 2. Sound channel: 2.1 3. Bluetooth version: 5.0 4. Playback format: MP3 5. Interface type: USB 6. Output power: 3W 7. Power input: DC5V 8. Extended storage: 32GB 9. Connection mode: Bluetooth connection 10. Signal-to-noise ratio: greater than or equal to 75dB 11. Frequency response range: 60Hz-15KHz 12. Bluetooth name: BT-SPEAKER 13. Power supply: built-in lithium battery 300mA / h 14. Support U disk, AUX, computer, TF, Bluetooth connection 15. Bluetooth distance: within 10 meters, there are obstacles in the way will be affected 16. Weight: 87.9g 17. Size: 7x7x5.5cm