Neck-type 5.0 Bluetooth Headset Ultra Long Battery Life Sports Wireless In-ear Headset Describe: Color: black//green Bluecomm AB5335B Bluetooth version: 5.1 Transmission distance: 10 meters headphone battery core: 90 mA Listening time: 8 hours Talk time: 8 hours Standby time: 800 hours Charging time: about 1 hour Holographic 3D sound field 3D sound Shocking audio-visual experience, front-frequency design, reduce vibration troubles, bring a three-dimensional sound field effect like a concert, enjoy unlimited music possibilities. Customized composite diaphragm, upgraded sound cavity with low distortion, a wonderful combination of carbon fiber composite diaphragm + large moving coil acoustic technology, resonating under the action of magnetism and electricity, allowing music to play a greater sound quality in a limited space Side-in-ear design, 3D S, always firmly in your ears, integrated design of oblique ear-in, forming a triangular stable support with your ears, even if you run, ride, and exercise vigorously, it still sticks to your ears. 1 charge, listening to music for a whole day, high-power polymer battery with low-power micro-power technology, bringing you all-day protection with second-speed charging and strong battery life Describe: 1x bluetooth headset Bluetooth Headset The More You Buy, the Better the Deal Christmaschristmas Decorations Before Christmaschristmas Decorations Clearancethe Before Christmasholidaynightmare Before Christmas Popchristmas Clearance To Better Fit You,please Do Measure the Size and Compare to the Size Chart Before Placing Order. AFTER SALE SERVICE: 30 Days after sales service and exchange, reply you within 24 hours to solve your problem.