Never Hurt. Never Fall Out Results matter, and when you have the perfect headphones there’s nothing standing in-between you and your workout. With their FlipHookTM design, they adapt to an in-ear or behind-the-ear fit for added convenience. A comfortable combination of FlexSoft ear tips and TwistLock technology means these buds are fitting securely in your ears and guaranteed never to hurt or fall out. And if you thought a little sweat or rain was going to ruin your Run 2, think again. Thanks to the IPX5 water resistant rating, JBL Endurance Run 2 headphones keep up with your every step, while an in-line microphone and remote ensures you’re never reaching into your pocket to answer calls. Specifications General Specifications Driver size (mm) 8.2 Number of Microphones 1 Audio Specifications Dynamic frequency response range (Hz) 20Hz - 20kHz Features Remote control in cable Yes Waterproof Yes IP Code IPX5 Built-in Microphone Yes Hands Free Call Yes JBL Pure Bass Sound Yes Sweat Proof Yes Twistlock Yes