New Upgraded Ergonomic Design: It is not only lighter, but also uses a newly developed in-ear curved design to make earwear more comfortable and eliminate the need to worry about falling off during outdoor sports. 50Hrs Playtime: Each earbud provides up to 12 hours of listening time on a single charge, giving you a total of 50 hours of music enjoyment in rotation with the charging case. Enjoy fast charging. ORIGX Acoustic Stereo Sound: The newly upgraded version of T6 provides powerful, high-quality stereo sound quality. TOZO has created an enhanced bass profile thanks to OrigX, yet punchy and deep as low as 16Hz responds that blends perfectly with the mids and trebles, keeping sound close to reality. Customisation EQ with TOZO APP: you can save the function of customizing the noise reduction intensity and EQ curve settings. TOZO Acoustic Lab provides 16 preset EQs in the APP, including Rock, Classical, Jazz, Hip-hop, etc, which perfectly reflect different music styles. IPX8 Waterproof