Pairing method: one-to- one automatic pairing, plug in and play
Channel: 2.1
Input voltage: 3.7V
Transmission mode: Bidirectional 2.4G frequency modulation
Power supply mode: Built-in 400mAh Lithium-polymer battery
Power Consumption: 0dbM <40Ma
Audio signal: digital sampling
Use distance: <= 15meters
Charging time: charge 2 hours, continuous use of 8 hours without interruption
Material: ABS fireproof material + lead-free material