Main Features:
- Special speaker transmits high powerful bass and detailed wireless sound to your ears
- In-ear design gives you long-time comfort
- The best combination of tuner's technology gives you full range audio spectrum and exposes all details of song
- Advance microphone system for clear calls in windy or noisy environments
- Bluetooth V4.1, transmission range is up to 10m

Specification:
Bluetooth: V4.1
Transmission range: 10m
Battery: 60mAh Li-ion battery
Standby time: 120h
Talking time: 3h
Working time: 4h
Charging time: 2h
Impedance: 16 ohm
Frequency: 20Hz - 20KHz 0.030 Package weight: 0.054 kg
Product Size(L x W x H): 6.12 x 1.39 x 1.23 cm / 2.41 x 0.55 x 0.48 inches
Package Size(L x W x H): 6.59 x 3.09 x 9.38 cm / 2.59 x 1.22 x 3.69 inches Package Contents: 1 x Earphones, 1 x Hook, 1 x USB Cable, 1 x Bilingual Manual in Chinese and English More Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones HeadphonesMore Sell M990 Bluetooth V4.1 Business Earphones Headphones