【Supports TOZO APP】 You can customize your audio experience for your specific preferences, try 16 preset equalizer settings, white noise options and personalized sound adjustments. Getting a Quick Guides and product FAQs faster by customizing gesture actions and performing product OTA software updates. 【14.2mm Dynamic Drivers & Dual Mic Call DNS】 The bluetooth earphones feature an 14.2mm dynamic driver, providing you with a more surround effect and a stronger sense of immersion when listening to music or playing games. Adopting Dual-mic Call Noise Cancelling technology with headsets to effectively eliminate background noise and ensure clearer calls. 【IPX8 Waterproof & Semi-In-Ear Design】 These earbuds boast an IPX8 waterproof rating and sweat-proof nano-coating, there is no need to worry about rain or sweat, which can protect your earphones in various conditions. The semi-in-ear design provides a secure and comfortable fit, making them perfect for active individuals. 【Extra Long Playback &Dual Power Display】 Tozo T21 offers up to 6 hours playback on a single earbuds charging and an additional 44 hours of the convenient wireless charging case. Featuring integrated LED digital display, you can easily keep an eye on the remaining battery life of each earbuds and charging case, always be ready. 【One Step Pairing & Seamless Connectivity】 TOZO T21 is compatible with various devices, including iOS, Android, and Windows, and will automatically reconnect when the case opens after the initial pairing. Bluetooth 5.3 ensures a stable and quick connection with minimal latency, making these earphone ideal for workout or working. What's in the box TOZO T21 Wireless EarbudsCharging CaseCharging CableQuick Guide & User Manual