Product Color: blackwhiteredBluetooth: 4.2Transmission frequency : 2.4GHz (2.402-2.480GHz)Transmission distance: 10MSpeaker sensitivity: 1205dBFrequency response : 20-20kHzPlay time: about 6-8hCharging time : about 1.5hPackage content: 1*wireless mini earphone1.NON EAR PLUG DESIGN - Upgraded headphone version is the Ear-hook design, not in-ear, free from eardrum damage. Easy to carry, suit for all peoples, do not fall when running. Wear in left or right ears, with glasses is ok. With Built-in microphone is for Hands-free calling.2.SPEAKER UNIT IS EXTERNAL - Loudspeaker close to the ear but it is not inside the ear, will not plug block the ear canal. Listening to the surrounding environment during a call or music, Safer on the road or in some scenes and more portable for business, work.3.Suitable for 2 ears - Suitable for the left and right ears, The ergonomic structure is adopted, and the smooth body curve is tightly attached to the ears, so that the ears are evenly stressed, giving you a better wearing experience.4.LIGHTWEIGHT DESIGN - 10g 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 or driving.5.Skin-friendly material design- The surface of the body is painted with metal, it is as delicate and smooth as the skin, and it is extremely comfortable to wear every time.Built-in 90mAh lithium battery to meet your needs for large power and longer battery life.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications.We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it