1. The product size: 170 x 105 x 90 mm 2. The material: ABS plastic 3. High fidelity simulation double track (Φ 40-4 Ω-3 W) speakers 4. The built-in high let mA lithium battery 5. USB charging design 6. Frequency response: 20-20 KHz 7. Distortion degree: or 8. SNR: > dB 9. Output power: 4 W 10. Bluetooth characteristics: ⊙ bluetooth version: bluetooth V2.1 and compatible V2.0, V1.1 and V1.2 standards. ⊙ chipset: CSR ⊙ support bluetooth function: support the bluetooth audio equipment ⊙ transmission power: Class2 ⊙ frequency: G ⊙ transmission distance: 10 M