These wireless headphones are equipped with Bluetooth 5.0 technology and A2DP support to enable audio transmission from your smart device or computer within a distance of up to 10M. In addition to Bluetooth, you can also play audio from 3.5mm audio sources using the provided 3.5mm audio cable. The headset features dynamic 40mm drivers that deliver deep bass. It has a built-in microphone that is ideal for hands-free phone calls. The soft, cushioned earpads and an adjustable, padded plastic headband offer exceptional comfort. The wireless headset has a built-in 200mAh lithium battery that supports up to 6 hours of playtime in wireless mode and can be recharged from your computer or an optional USB charger (USB cable provided). They are easy to use and foldable for convenient storage in your backpack.