Support: Memory Card, Aux Cable, Bluetooth, FM, you can switch channels Wireless/ Wired: Its your choice: Who said you have to choose between one. MS771 can be connected via Bluetooth or an aux cable. Along, with the latest Bluetooth technology, it also has the ever-green aux port for when you are out of charge Intuitive Controls – Intuitively mounted buttons control over the left ear cup allow you to control music and manage calls directly from the headphone no need to take out the phone every time to change the track. MP3 playback function: you can insert TF card (phone memory card) to play music, you can also insert a single headset memory card can play music, pause, up and down tune, volume adjustment, etc. Comfortable Wearing – Ergonomically designed ear-cup foldable head brand and around-ear cushion block the ambient noise and minimize the strain on the ears for hours of non-stop entertainment.