EEB8776B 55mAh Built-in Battery Neckband Earphone Bluetooth Headset

Bluetooth：V4.2

Speker Dimension:10mm

Battery:55mA

Charging Time:1.5h

Playing Time:2.5h

Sensitivity:103±5db

Frequency Response:20Hz-20KHz

Working Distance:10m(Barrier-free Space)

Impedance:32 Ω