OVLENG Bluetooth Headset S33, 40mm, Microphone, Gray S33-GR

Bluetooth version: V4.1 + EDR

Loudspeaker Frequency Response: 20HZ - 20,000 HZ

Operating distance: about 10 meters.

Built-in rechargeable battery.

Battery Model: Lithium polymer battery 300mAH

Loudspeaker Diameter: 40 mm

Loudspeaker Impedance: 32 ohm

Working Time:  4 ~ 6 hours

Talk Time: 8 ~ 10 hours

Charging Port: Micro USB

Microphone Sensitivity: -42 dB

 Dark Grey