Key Features . 5 hour battery life with 19 hours stored in the caseSimple touch controlsENC Noise Reduction TechnologyCase Compatible with Wireless ChargingSimultaneous Transmission Between the Earphones . Double-tap simplifying the complicatedEasily operated without a phone. Simply tap the earphones to control the music call activate voice assistant etc. Wireless charging + 24-hour battery life to keep you company all dayThanks to the power consumption control of the new generation chip and the increased battery capacity of the case the battery life lasts for up to 24 hours with the case and 5 hours for single earphone use. The case is compatible with Qi standard wireless charging for easy charge making sure the earphones stay fully powered. ENC Environmental Noise Reduction TechnologyThe dual-microphone employs integrated environmental noise reduction technology to effectively reduce surrounding noise. It also ensures high-resolution voice recognition and call quality even in noisy environments. New experience with low latencyLHDC Bluetooth decoding is fully optimized for MIUI systems and hardware has been deeply optimized with a new architecture. When the low-latency setting is turned on the sound latency is greatly reduced to ensure synchronized sound fully enhancing the audiovisual gaming experience. Left and right main earphones Full performance boostMi True Wireless Earphones 2S Upgraded Dual-Core Chip featuring new binaural synchronous transmission technology* that delivers sound signals to both left and right earphones simultaneously effectively reducing sound latency while minimizing interference and a more stable connection between left and right earphones..