Main Features:
- Bluetooth V4.1, compatible with most devices and high speed connection
- Wireless connection, stereo HiFi earphones, suit for outdoor sports
- CVC noise reduction technology, isolated from the world and ensure clear calls
- Sweat and water proof

Specification:
Bluetooth: V4.1
Transmission range: 10m
Battery: 100mAh Li-ion
Working time: 8h
Charging time: 1h
Impedance: 32 ohm
Sensitivity: 92 - 5dB or 92 + 5dB 0.053 Package weight: 0.078 kg
Package Size(L x W x H): 9.20 x 7.00 x 3.50 cm / 3.62 x 2.76 x 1.38 inches Package Contents: 1 x Earphones, 1 x USB Cable, 2 x Earbud, 1 x English User Manual