1. Possess utility model patents and design patents
2. MICRO USB charging port, fully charged and standby for 4-6 hours.
3. Use with a mask, real-time loudspeaker, amplify the sound, and the sound quality is clear.
Battery capacity: 400mA/h
Battery type: polymer lithium battery
Charging time: 1.6H
Continuous use: about 5H
Output power: 1.6W
Charging interface: MICRO USB
Speaker: 8Ω/2W