About this item 【Music IEM Headphone】 noise-cancelling design Enjoy HD Stereo Sound in a Comfortable Way. With 10mm （Often less than 8mm on the market）advanced driver and expertly-tuned sound, this Bluetooth in-ear headphones offer you with outstandingly clear sound with full energetic run and perfect bass. Even at max volume, the electric current noise is hard to hear. You can utilize Built-in receiver’s mic for making hands-free calls inside 33ft/10m wireless range. 【Optimized battery design】Just Charging 1-2 hours-This Bluetooth in-ear headhones can play continuously for 100 hours, and the standby time can be up to 30 days. The charging interface is the world's universal interface type-c, and the charging speed is faster. 【Ergonomic sport design 】Thanks to an optimized battery design and skin-like silicone rubber material, this sports headphone weighs only 46g. The neck part of the earphone is made of soft silicone rubber, which can be folded arbitrarily. It is skin-friendly and has less pressure on the neck when exercising, making it easy to carry and store. 【Comfortable 】The Neckband Bluetooth Headphones are designed to fit the ear canal without pain in the ear and not easy to fall off. It is easy to store,and the two earbuds can be magnetically attracted together.No pressure on neck and ears when wear neckband bluetooth headphones for long time. 【Easy control for IEM headphones】You can use these 3 easy-click buttons to skip to forward/backward tracks, increase/decrease the volume, control phone calls.Click the function key to display the battery level of the headset. Double-click the function key to switch the sound between bass/vocal/3D equalization - these three modes. Triple-click the function key to switch to game mode.