One-step Paring Technology Pick up 1 or 2 headsets from charging box you can seamlessly pair this device to your Bluetooth devices automatically without any problem and don’t need any skills to use Bluetooth earbuds Impressive 100H Playtime Utaxo wireless earbuds can last for over 5 hours' playtime from a single charge and 20 extra times in the 2200mAh aluminum alloy compact charging case (The charging case supports wireless charging and provides convenient charging way with no strings attached) New Slide-cover Design & Mic Single/Twin Mode With role switching techniques the earbuds can be switched freely on right or left earbud and support working together to enjoy stereo sound TWS & Bluetooth 5 0 Adopt the most advanced Bluetooth 5 0 technology Utaxo wireless earbuds provides in-call stereo sound Also own fast and stable transmission without tangling Hi-fi Stereo Sound Quality Adopt the most advanced tws chip Utaxo earphones offers a truly authentic sound powerful bass performance and purity to your music (55)