The new JBL T50HI is a dynamic, ultra-lightweight in-ear headphone. Its powerful 8.6mm drivers deliver the feel-it-in-your-bones bass response and legendary sound quality you expect from JBL. They’re feather-light for all-day comfort. An in-line microphone with universal remote control lets you talk and manage your calls on Android and iOS devices. Driver size 8.6mm; Frequency range 20-20kHz; Impedance 30±4.5 ohms; Driver sensitivity 101±3dBSPL, 1mW; Maximum SPL 10mW; Rated power input 3mW; Cable length 1.2M.