1. Main control: Juli 3315D, memory: Magnesium original2. Support audio format: MP3, WMA3. Signal to noise ratio: 85dB4. Working temperature: 0-50 degrees Celsius5. Waterproof level: IPX686. Power supply: built-in polymer rechargeable battery, battery specifications; 041235, battery capacity, 120 mA7. Dimensions: 64 × 26 × 12mm8. Bare metal weight: 16g9. Weight after packaging: 30g10. Outer box size: length 42.2 × width 27 × height 60cm11. Net weight: 8.95Kg, gross weight: 9.95Kg12. Material ABS + pvc13. Accessories: 1 waterproof earphone; 1 3.5USB transfer cable; 1 English manual