<br><b>Features: </b> <br><br> 7 options to choose the most suitable frequency <br>Powered by the included micro USB port. <br>Ergonomics design, convenient to wear, tightly on the ears. <br>Both sides could receive voice and can adjust the volume separately <br>Noise reduction and echo cancellation technology ensure clear sound quality. <br>Compared with traditional hearing aids, it is more comfortable and healthy. Best gift for hearing difficulties <br>Please make sure that your device has at least one of these 3 jacks: 3.5mm Audio Out/Coaxial Out/Red-white Audio Out, which this TV speaker only supports. The wearers listen to sounds from phone, pad, laptop clearly with the cable.<br><br><b> Specifications:</b> <br> Frequency range: 100~18kHz <br> Microphone sensitivity: -54±2dB <br> Operating time: 12±2 hours <br> Standby time: 60 days <br> Charging time: 3 hours <br> Input: DC 5V, Max500mA <br> Weight:69g <br> Battery: Li-ion battery capacity 3.7V 350mAh <br><br><b> Maintenance:</b> <br>※ Do not use it in rainy/stormy days. <br>※ When first use it, please make sure the hearing headphone is fully charged. <br>※ Support to use and charging the headphone simultaneously, and the LED light will remain red. <br>※ The standard charging time is 3 hours. Please do not charge it over 24 hours. Otherwise, it will affect the battery life. <br><b> Package included:</b> <br> 1 x Bone Conduction Hearing Aids Headphone <br> 1 x Micro-USB Cable <br> 1 x Audio Cable <br> 1 x User Manual