Styled in black, the JBL Endurance RUN are sweatproof, wired, in-ear sport headphones that feature the flexible Fliphook design, allowing for in-ear or behind-the-ear deployment. Thanks to the TwistLock and FlexSoft technologies, these lightweight headphones offer an ergonomic design that ensures a secure and stable fit, no matter the workout. The integrated 8.2mm dynamic drivers provide a full frequency response of 20 Hz to 20 kHz