A quick 10-minute charge delivers up to 20 hours of immersive audio playback.; The flagship-level battery life delivers up to 30 hours of non-stop music on a single charge. A large 12.4 mm bass driver delivers uncompromisingly deep bass for powerful beats. Experience incredibly rich audio detail at every frequency with the titanium coating dome Anti-distortion audio technology ensures your audio playtime stays silky-smooth. Thanks to the larger sound cavity and industry-leading algorithms, notes remain distortion-free Water and sweat-resistant, the IP55-rated internals and design ensure your OnePlus Bullets Wireless Z2 stay all-weather ready. Model: E305a; Control Type: Call Control; Battery Average Life: 30.0 Hours