Curved Surface and Semi-in-Ear 0.1 Degree for Optimum Comfort After thousands of experimental tests, the earbuds' entry angle into the ears is optimized with a precision of 0.1 degrees to facilitate comfortable and secure wearing. Bluetooth V5.3 For Fast and Steady Performance Bring more stable and smooth connection for your wonderful experience. Weighs Only 3.6g Feathery Light, No-Pressure Wearing Lightweight Short Stem Semi-In-Ear Design. Small in size, the earbud is as light as 3.6g, bringing you no burden even after long-time wearing. 26 Hours Long Battery Life For All-Day Enjoyment Edifier Acoustics Laboratory selected titanized composite diaphragm to improve sound quality and create richer and more delicate sounds. Featuring surging bass and crystal-clear mid-range and treble, the earbuds present CD-level original sounds. AI Algorithm Enviromental Noise Cancellation Clear Sound Quality Equipped with the new-generation algorithm, the earbuds can be used in multiple scenarios to reduce environmental noise, enhance human voice, and improve sound clarity and fidelity. Even in a noisy environment, you can enjoy clear calls. Master-Slave Switching For Convenient and Comfortable Wearing Using one or two earbuds, you can immerse yourself in wonderful listening in both ways. Powerful Sound, Surging Bass, Melodious Mid-Treble Built-in 13mm large-size unit, the earbuds present dynamic performance and excellent details, furnishing you with soul-stirring sound. Reach 60ms Low Latency Under Game Mode With a low delay under game mode, the earbuds bring users a better gaming experience and secure a victory for users by guiding them to accurately identify the position of enemies.