headphone conducts the speaker through the bone and transmits sound to the bone near the external canal, then to the auditory nerve. It avoids the occurrence of ear damage and hearing loss, giving your healthy listening. IPX8 waterproof and light-weight design immerse you in sports and music, suitable for walking, hiking, running, climbing, skating, driving, and other activities. With 8GB independent memory, it supports MP3 playback mode, and can also switch to BT playback mode.

MP3 Playing Mode: 
Built-in 8GB memory capacity, you can download the music you like to this headphone via data transfer cable and able to enjoy music through MP3 play mode.
BT 5.0 Connection:
BT 5.0 ensures high data transfer speed, stable connection, and low power consumption. Free to enjoy hands-free calls or BT music via BT connection.
Born for Sports:
IPX8 waterproof and 28g light-weight design immerse you in sports and music, suitable for swimming, walking, hiking, running, climbing, skating, driving, etc.
Long Battery Life:
135mAh rechargeable Lithium battery provides about 6 hours of playback time (at 65% volume) on one full charge and the charging time is about 2 hours.

Specifications:
Brand: Lenovo
Model Number: X5
BT Version: 5.0
Operation range: Up to 10 meters (no obstacle)
Frequency Range: 20-20KHz
Mic Sensitivity: -42±3dB
Battery Capacity: 135mAh
Music Playing Time: up to 6 hours (depends on music volume)
Charging Time: about 2 hours
Color: Black
Main Item Size: Approx. 13.8*10.4*4.9cm/5.43*4.09*1.93in
Main Item Weight: Approx. 28g/0.98oz
Package Size: Approx. 16.0*13.0*6.0cm/6.30*5.12*2.36in
Package Weight: Approx. 234g/8.25oz

Package List:   
1 * Bone Conduction Headphone
1 * Charging Cable
1 * Swimming Accessory 
1 * User Manual (English/Chinese)