Feature:1.LIGHTWEIGHT DESIGN : 8.1g weight, very light, no pressure or pain feeling in long time use. Ear hook designing and ergonomic design, wireless headphone affixed to the ear, suit for all peoples, do not fall when running. Wear in left or right ears, with glasses is ok. 2.PAINLESS WEARING : This Bluetooth Headphone is without ear plug, hearing in nature way. Non ear plug and the built-in speaker are closer to the ear and not inside the ear. The sound waves reach ear in nature way, just like you hear sound from outside. No pain or sensation of swelling which comes from ear plug in long time use.3.HIGH QUALITY SOUND : These Bluetooth headphones adopted advanced Bluetooth V5.0 with EDR technology, blocks disruptive background noise like wind or crowds, offers crystal clear audio and natural sound, allows you to enjoy high quality music and clear phone calls wherever.4.CONNECT TWO DEVICES SIMULTANEOUSLY : Allow two Bluetooth devices to connect at the same time. Even two cell phones, you will never miss a call. Universal and compatible with most of bluetooth enabled computer, laptop, tablet and cell phones.5.LONG-LASTING BATTERY LIFE : The built-in lithium-ion battery provides up to 120 hours for stand-by and up to an amazing 4-5 hours for continuous talk. It only takes 1-2 hours to get fully charged. With 33ft (10meters) bluetooth working range.Specification:Buetooth version: 5.0Bluetooth range: 10 metersStandby time:120-150 hoursPhone time: 4-5 hoursMusic time: 4-5 hoursCharging time: