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