Features:
No in-ear playback, automatic noise reduction, dual microphone, effective protection of hearing, can also hear the sound of the surrounding environment when listening to songs, walking, no, outdoor activities are more secure.
Built-in 8GB Memory: You can use the memory to play music, you can also connect to BT playback, giving you a choice.
Lightweight to Wear, Memory wire integrated design, net weight 33g, flexible material to make the wear stable, no pressure.
BT 5.0 Transmission +180 mAh Large Battery: Continuous playback of music up to 6 hours (depending on the playback environment), 10m barrier-free connection, signal stability, sound quality process, lower power consumption.
IPX5 Waterproof Nano Design: It is waterproof regardless of sports, sweat, rain.

Specification:
Type: Bone Conduction Headphones
BT Version: V5.0
Color: Blue, Green, Grey(Optional)
Transmission distance: within about 10m/32.81ft
Horn Type: Bone Conduction Hom
Horn Sensitivity: 88+3db
Microphone Sensitivity: -38+3db
Call Noise Reduction: support dual MIC noise reduction, make the call clear 
Local playback: support 8G storage 
Frequency response range: 20Hz ~ 20KHz
Play time: about 6 hours (depending on the playing environment)
Battery capacity: 180 mAh
Charging time: 1 hour
Waterproof grade: IPX5
Appearance size: about 130*110*50mm/5.12*4.33*1.97in
Product weight: about 33g
Package Size: 16 * 12.5 * 6cm / 6.3 * 4.9 * 2.4in
Package Weight: 168g / 5.9oz

Package List:
1 * X9 Bone Conduction Headphones
1 * USB Cable
1 * User Manual