K21 300mAh Wireless Bluetooth Headphone Headset Stereo Super Bass Earphone Earbuds Microphone

Description:
100% brand new and high quality!
Hanging ear design, feel zero pressure, wear painless for a long time.
The auricle design, the earphone and the ear bones fit together.
With 300 mAh lithium battery, you can achieve continuous standby for about 70 days without changing the battery, listening to songs about 24H, and talking about 32H.
Funny filter noise, deep restore the recorded sound.
The left and right ears can be freely converted to wear.
Anti-sweat, as well as smart voice prompts.

Specification:
Color: black and gold, white and gold, black and silver
Size: 45*65*18 mm (approx)
Bluetooth version: V 4.2
Use radius: 8-12 meters
Supported language: Chinese / English
Charging mode: 5V/1A charger
Boot: long press for 3 seconds
Shutdown: long press for 4 seconds
Pairing: long press for 5 seconds
Answer/hang up: short press once
Reject: double click
Play/Pause: Short press once
Previous song: long press for 2 seconds