B31-D

B31-D2018-12-17T02:30:57+00:00

Project Description

Bluetooth Version: 4.2

Speaker: D40MM,3W 4Ω

Frequency Response: 130HZ-20KHz

Effective range: ≤10m

SNR: ≥90±3db

Polymer battery: 300mAh

Playing time: 3~4 hours

Charging time: 1.5 hours

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