The newly developed, highly efficient 11.8 mm Hi-Res Audio drivers allow the ATH-CKR70iS in-ear headphones to faithfully reproduce the crystal-clear sound of high-resolution audio sources. The strong yet lightweight machined aluminum housings reduce unwanted resonance, and their design positions the drivers for optimal performance, while ensuring a comfortable fit with excellent sound isolation. The performance is further enhanced by high-precision stabilizers that ensure linear diaphragm movement for controlled response.  The ATH-CKR70is headphones are equipped with an in-line controller and microphone to let you easily answer calls and control music and video playback. Four sizes (XS, S, M, L) of interchangeable eartips are included to provide a customized fit and improve sound isolation. Available in black (ATH-CKR70iSBK) and champagne gold (ATH-CKR70iSCG)