The Minor II Bluetooth In-Ear Headphones from Marshall are engineered to wirelessly stream high quality audio via Bluetooth 5.0 aptX technology from compatible devices. When paired with a smartphone, you can utilize the built-in microphone to conduct hands-free phone calls while your phone remains in your purse or pocket. All of this functionality is meant to be easily controlled by using the in-line, multi-directional control knob. When listening to music or having a conversation, the in-ear design and adjustable ear-fit system help to provide a snug fit and passive noise isolation for a more enjoyable experience.