The bone conduction headphon can relax your ears out of the touch of aurical and inner avoiding the risk of swelling and bacteria growth in the ears no damage to your outer ears either.</br>Innovative Bone Conduction Technology - using vibrations to transmit sound waves directly to the cochlea by vibrations. Listen to the music without blocking your ears you can enjoy the music and pay attention to the traffic situation during driving or running on the road.</br>Sweat resistant shock resistant and dust resistant. No worries about outdoor exercise. Applied latest bluetooth V4.2 wireless transmission distance up to 33 feets.</br>Adjustable headband for tight and comfortable wearing. No worries about the headset falling. Universally Compatible - Suitable most Bluetooth-enabled devices.</br>For the headset we developed an APP to control your headset with your phone after the bluetooth connection of two devices. You can see how much the power of your headset is and control your headset. Just press the right key to answer a call. More functions and fun it's worth for you to have such a headset. Besides?? it's a creative Christmas gift or New Year gift.</br></br>Product Description</br></br>Product Dimensions??137.3*123.66*49 MM.<br> Weight: 39g .<br> Blue tooth Version: V4.2 (completely compatible V2.1/V3.0/V4.0/V4.1??V2.1+ EDR and V3.0 + HS).<br> Bulit-in 8GB FLASH Memory ??16GB~128GB optional)?? it can play the music from the flash disk directly??this is not only a bone conduction headphones but also a portable MP3 Player.<br> Support Pedometer (APP\APK Synchronization).<br> APP\APK connect mobile phone (Downlaoding number: Earshield).<br> Telegram phone number (the headphone will voice broadcast the caller ID).<br> Battery: 250mAh Polymer battery. <br> Play time: 6-8hours.<br> Standby time: 240hours