With an increasing amount of language learning being done online and with mobile devices (such as with iPads®, Nooks®, and Chromebooks®), the importance of an audio component continues to grow. Both PARCC and Smarter Balanced also integrate the use of audio for testing purposes. Growing text-to-speech functions also underscore this trend. This lightweight stereo Ear Bud headphone delivers full-bodied sound. The E2 works with iOS, Windows and Android-based platform devices and is iCompatible with tablets, smartphones, netbooks, notebooks, desktop and laptop computers.