Bonein BN803 Bone Conduction Headphone Wire Headset Foldable Hearing Earphone IP55 Waterproof 7 Adjustable Volume Sound Pickup Earphone Built-in 380mAh Battery ( #: V9511 )

Features:
Bone Conduction Design:
The sound transmits through the bone to the auditory nerve, no need to put into the ear, no eardrum damage, good for the user to avoid ear disease and hearing losing.
Ear-free Keeping Danger Away:
Release your ears to listen to the world, you can respond to the surrounding situation quickly, far away from danger.
Multifunctional Wired Earphone:
Use the audio cable to connect the control box with the radio, phone, and other equipment. The elderly could hear and adjust the sound of the devices clearly from the 803 earphones.
7 Adjustable Volume:
7 frequency modes for the elderly to choose the most comfortable sound frequency for them and separately adjust right /left voice volume too，healthy hearing for the elderly!
Long Battery Life:
380mAh rechargeable Lithium battery provides up to 8-12 hours of playback time on one full charge, 1000 hours standby time foldable, and easy to carry.

Specification:
Item: Bone Conduction Headphone
Material: ABS
Frequency range: 20~20kHz
Microphone sensitivity: -54±2dB
Working time: 8-12 hours
Charging time: 3 hours
Input: DC 5V 500mA
Battery: 502530PL 3.7V 380mAh
Sound Volume: 7 modes, right /left separately adjust
Color: Black
Main Item Weight: 68g / 2.4oz
Package Size: 20*16*5cm / 7.87*6.3*1.97in
Package Weight: 356g / 12.56oz

Package List:   
1 * Bone Conduction Headphone
1 * Charging Cable
1 * 3.5MM Cable
1 * Lanyard
1 * Ear Plugs
1 * User Manual