Key Features. 4 hour battery life with 8 hours stored in the case Intuitive one button control Swappable ear tips Auto connect. Pick up & connect Put in & use Incredibly simple to use the Mi True Wireless Earbuds Basic 2 are ready to use as soon as you take them out of the charging case. Just put them in your ears & your audio experience awaits you. Free & seamless switching between single-ear & double-ear The Mi True Wireless Earbuds Basic 2 optimize the way the left & right earphones are connected. With no restriction on primary & secondary devices you can switch between single-ear & double-ear seamlessly. Put in one earphone for mono sound & then put in the other to automatically resume stereo sound with no need to pair again. Bluetooth 5.0 High performance with faster more stable connections The Mi True Wireless Earbuds Basic 2 are equipped with the latest Bluetooth 5.0 chip which has a data transmission speed two times faster than the previous generation as well as faster & more stable connections. That's what the newest generation should look like. Physical button to avoid misoperation Simply control music & calls with one button activate the voice assistant by pressing either earphone twice* & access navigation at any time. 12-hour-long battery life Can be used continuously for Approx. 4 hours after a full charge & for Approx. 12 hours together with the charging case..