Features 1??Headphones hearing aid, through the jaw to transmit sound to the hearing nerve, effective preservation of the remaining eardrum function. 2??Suitable for hearing impairment (mild, severe, even completely broken eardrum) but the ear nerve intact in different age groups, can effectively improve their quality of life. 3??Has the function of independently adjusting the gain of left and right ears to ensure the hearing balance of both ears. 4??Can be connected to mobile phones, radios, computers and other equipment, the realization of sound exclusive. 5??Can clearly identify normal sound, do not need excessive volume, such as watching TV and talking on the phone, do not need high decibel. 6??Comfortable wearing experience, do not hurt the eardrum, safety to use. 7??Stylish appearance, wearing like ordinary headphones, improve the quality of life. Specification Condition: Item Type: Hearing Aid Connect the headset to the 5V charger with the supporting USB cable for charging. When in use, the red indicator will always stay on. The standard charging time is about 3 hours, do not exceed 24 hours, otherwise the battery life will be reduced. Speaker Type: Bone conduction technology speaker Frequency Response Range: 20~20 KHZ Sound Pickup Sensitivity :-54??2dB Standby Time: 60 days Working Time: 12??2 hours (depending on volume) Battery: Lithium ion battery 3.7v 350mAH Charging Time: about 3 hours Headband Weight: 35 g / 1.2 oz(approx.) Sound Pickup Box Weight: 34 g / 1.2 oz(approx.) Package List 1 x Hearing Aid 1 x Charging Cable 1 x 3.5mm Audio Cable 1 x Manual