1-BUD Single-Ear Stereo Earphone w/ 3.5mm Plug and 3 sizes of rubber eartips - for MP3 Players, Tablets, and all Apple iPod, iPhone and iPad Models -Black Combines the left and right audio channels into a single earpiece Has a 1/8-inch size 3.5mm plug, compatible with most devices Enables users to safely keep one ear open to surrounding activities while listening to audio content Very popular for those with single-sided deafness