Bone Conduction headphones working principle is to transmit external sound through the skull after amplified by the chip As bone conduction headphones using plug-in, not with the ear canal contact, to avoid the incompatible, especially for the elderly choose Bone conduction headphones is easy to use, no surgery, can wear at any time of need and can be own adjusted, without plug into the ear canal Release the ears to make air circulation, reduce ear disease Long-term use will not damage the residual hearing, but can continue to stimulate the auditory nerve, is conducive to rehabilitation How to use it Fix the "Sound pick up" on the collar or shirt packet with "Wear clamps", switch on the headphone(On/Off). Note: 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. Storage and maintenance: When the headphones is not in use, turn off the power. Can use a clean, soft cloth daily clean the whole device Note: the pickup box is not water proof design. So do not use wet cloth to clean this part. Particularly, the chemical solvent cleaning such as pure alcohol, acetone, etc can not be use! Charging When the red LED on the "Indicator light" is lit, the build-in battery is less than 20%, please charge it using the micro USB wire in the package. Input power is 5±0.5V. Please use 5V power adaptor which conform with national safety standards. Note: the charging time may not be more than 24 hours Specifications Frequency range: 20-20kHz Microphone sensitivity: -54+/-2dB Operating time:10+/-0.3hours Standby time:over 60days Input:DC5.0+/-0.5V Max500mA Battery: Li-ion battery capacity 3.7V 350mAH
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