Bones Conduction Bluetooth Earphones With Non In Ear Clip Style Sports Digital Display And Ultra Long Battery Life Wireless Earphones Specification: Product Name:Bluetooth Earbuds Gross weight: 0.21lbs/0.90kg Package size:12X8.1x5xcm/3.19x1.30x1.97inch Bluetooth:5.3 Operating distance:115m Musical playback time:4 hrs Box Charging time: 1.5 hours Battery capacity:400mAh/40mAh Features: Good speakers to give you enough shocking stereo surround sound the lossless subwoofer experience Three-band balanced strong acoustic configuration lossless high and low bass sections transparent and more three-dimensional good sound quality so that the sound back to the real clear and natural as in the real world 8mm hard-core coil digital high-frequency decoding high sensitivity and high resolution strong and powerful treble thick and full bass Upgrade 5.3 Bluetooth chip transmission high performance low power consumption improve sound quality Small size light as nothing can be worn for a long time battery charging box is very small carry space-saving Intelligent pairing take out the choice of Bluetooth automatic connection the first connection the second time automatic pairing take out the boot put back the shutdown Smart fingerprint fully cell phones tablets computers and other Bluetooth devices support Bluetooth devices can be used Package Include: 1x Bluetooth Earbuds 1x USB Cable 1x Specification