These in-ear headphones use an in-line microphone to make them exceptionally easy to use with your smartphone, reproducing clear sound alongside excellent noise isolation. Comfortable Fit Design The TCM115 earpieces are designed to fit so snugly into your ears that they always stay comfortably in place as well as creating an airtight structure that blocks external sounds for enhanced musical enjoyment. Mic and Remote Control The TCM115's support microphone and remote control functionality that's compatible with iPhone, BlackBerry ® and Android™ devices. This means that as well as being great for listening to music from your existing smartphone, they also let you use their mics for smartphone conversations.