BWOO BW44 earbuds are built with an upgraded antenna that can achieve a sensitive auto connection between devices. Although you need to connect it to the target device manually for the first time, it will automatically connect to it every next time. Also, these earbuds feature smart touch controls that allow you to switch between the music and calling models with just a slight touch, providing you with a free and intelligent user experience. Compatible with iOS and Android systems, these earbuds can be connected to plenty of electronics, including mobile phones, tablets, PS4s, tablets, etc., through the BT 5.1 wireless connection. Offering two ways of charging, these earbuds have a lightning charging port for wired charging and a wireless charging configuration for wireless charging, providing you with a free charging experience.