Features:More Comfortable and Healthier: The sound transmits through the bone to auditory nerve, more comfortable and healthier than traditional hearing aids, suitable for people who has trouble in listening.   
Keeping Ear Disease Away: No need to put into ears. It releases your ears to allow the air to circulate, easy to clean, to avoid ear disease caused by sweat.
AUX IN Function: With an additional 3.5mm audio cable that connects the bone conduction hearing aids to the mobile phones, PADs or laptops, this hearing aids allows for easy access to calls and multimedia entertainment.
Ear-free Keeping Danger Away: Release your ears to listen the world, you can response to the surrounding situation quickly, far away from dangerous, suitable for many outdoor activities.

Note 1: The pick-up box is not water proof design. So do not use wet cloth to clean this part.
Note 2: If the squeak is happening, please switch off the headphones first, then adjust the both volume to minimum, switch on the headphone again, and adjust the volume higher to appropriate again.

Specifications:
Model Number: YKL-801
Frequency Range: 20Hz-20KHz
Microphone Sensitivity: -54dB±2dB
Built-in 350mAh rechargeable Li-ion battery
Operating Time: 10±0.3 hours
Standby time: over 60 days
Input: DC 5.0±0.5V, Max 500mA
Color: Black, Brown (Optional)
Main Item Size: 14.6 * 13.2 * 2.7cm / 5.74 * 5.19 * 1.06in
Main Item Weight: 59g / 2.07oz
Package Size: 17.5 * 16.0 * 3.3cm / 6.89 * 6.30 * 1.30in
Package Weight: 148g / 5.23oz

Package List:   
1 * Bone Conduction Headphone
1 * 3.5mm Audio Cable
1 * USB Cable
1 * English / Chinese User Manual