1. Solution chip: 5.4 

2, transmission distance: 10M

• 3. Drive unit: 10MM
• 4, unit impedance: 32 ohms
• 5, rated power: 3mW
• 6, frequency range: 20-20000hz
• 7, battery capacity: 40mAh
• 8, battery life: 15H (70% volume)
• 9. Charging time: 2H
• 10. Charging capacity: 300mAh
• 11, charging cable length: 300MM