Never Hurts and Never Fall Out - Results matter and when you have the perfect headphones there’s nothing standing in-between you and your workout. Streaming wirelessly, the JBL Endurance Run 2 wireless will get you the motivation you need to push harder with powerful JBL sound. With their Flip - Hook design, they adapt to an in-ear or behind-the-ear fit for added convenience. A comfortable combination of Flex - Soft ear tips and Twist - Lock technology means these buds are guaranteed never to hurt or fall out. Thanks to IPX5 waterproof, JBL Endurance Run 2 wireless headphones keep up with your every step so sweat or rain will not ruin your workout. With a playback of 10 hours, the JBL Endurance Run 2 wireless feature an in-line microphone and remote for hands-free control of sound and calls. The magnetic buds secure your JBL Endurance Run 2 wireless conveniently around your neck while not in use. Enjoy your workout! FlipHookFlexible two-way design allows you to wear the headphones either in-ear or behind-the-ear. - Never hurt. Never fall out. - Thanks to Twist - Lock and Flex - Soft technologies, these headphones are lightweight and ergonomically built to ensure secure fit and stability no matter the workout.WaterproofDesigned to endure and outlast your high intensity outdoor or indoor workout sessions in any weather conditions, thanks to the IPX5 rating.SpecificationsDriver size (mm): 8Number of Microphones: 1Driver sensitivity at 1kHz/1mW (d - B): 99Dynamic frequency response range (Hz): 20Hz-20kHzImpedance (ohms): 16Earpiece Weight (g): 19.7Earpiece Weight (oz): .70Bluetooth profiles: A2DP V1.2, AVRCP V1.5, HFP V1.5Bluetooth frequency: 2.402GHz-2.48GHz - Bluetooth transmitted modulation: GFSK, π/4DQPSK, 8DPSKBluetooth transmitter power: 0-4dbm - Bluetooth version: 5.0Charging time (hours from empty): 2Maximum play time (hours): 10