Features: 100% brand new and high quality Our bone conduction technology delivers audio through the cheekbones, Unlike traditional headphones that send sound through the ear canals, With nothing inside or over your ears, enjoy total awareness and comfort while you listen. The external hanging type is not worn in the ear, and does not hurt the ears High-fidelity sound quality, super stereo sound quality shocking Built-in 150 mAh high-performance pure cobalt polymer lithium battery, full charge takes 2 hours, battery life can reach 4-6 hours, standby 200 hours; Bluetooth-compatible /MP3 dual mode (optional) Bluetooth-compatible 5.0, built-in microphone supports high-definition calls The whole machine weighs 16G/0.56oz, weighs less than 3 coins, and is ultra-light and non-sense to wearAdjustable semi-memory metal connection line, perfectly matching various head types Package Includes: 1 PC x Headset 1 PC x Charging Cable 1 PC x Manual Specifications: Waterproof Level :IPX5 Material: ABS+PC+ half Memory Alloy Bluetooth-compatible Version: 5.0 Earphone Battery Capacity: 150mAh Charging Time: 2Hours Play Time: 4-6Hours Standby Time: 200 Hours Connect Distance: 10M/32.8ft Type: Standard / With 16GB Memory (Optional) Color: Black / Gray (Optional) Cable: With USB Charging Battery Life: 8 Hours Long/Per Charging Weight: 16g/0.56oz Size: approx 13.8x9.2x4.8cm/5.43x3.62x1.89in note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!