30mm drivers provide a broad frequency response (5–22 kHz), while an acoustic bass booster provides amazing bass response. Technology for Connectivity: For hands-free phone calls, a wired in-line microphone Suitable for smartphones running Android or Apple, On-ear, lightweight design Swivel design for portability, free SmartKey app for personalized in-line remote functionality, 47 1/4 inches (1.2 meters) Non-tangled Y-type cord