Key Features. 5 hour battery life with 19 hours stored in the case Simple touch controls ENC Noise Reduction Technology Case Compatible with Wireless Charging Simultaneous Transmission Between the Earphones. Double-tap simplifying the complicated Easily 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 day Thanks to the power consumption control of the new generation chip & the increased battery capacity of the case the battery life lasts for up to 24 hours with the case & 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 Technology The dual-microphone employs integrated environmental noise reduction technology to effectively reduce surrounding noise. It also ensures high-resolution voice recognition & call quality even in noisy environments. New experience with low latency LHDC Bluetooth decoding is fully optimized for MIUI systems & 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 & right main earphones Full performance boost Mi True Wireless Earphones 2S Upgraded Dual-Core Chip featuring new binaural synchronous transmission technology* that delivers sound signals to both left & right earphones simultaneously effectively reducing sound latency while minimizing interference & a more stable connection between left & right earphones..