Heart rate monitoring, wireless in-ear headphones for athletes. Convenient, comfortable in-ear technology developed by experts and tested by athletes. Hear spoken on-demand heart rate updates and optimize your endurance training session to achieve your goals - just touch the right earbud. With UA Record, your dashboard for connected fitness, you can view in-workout training analysis and customized heart rate feedback so you can improve performance. Train harder and smarter with Under Armour Sport Wireless Heart Rate - Engineered by JBL. These wireless, sweat proof headphones deliver energizing music and heart rate tracking into your endurance sports training, all in your ears. With UA Record, your dashboard for connected fitness, you can view in-workout training analysis and analyze your performance as your training progresses. And you can even hear on-demand heart rate updates thanks to a touch sensor on the right earbud. Ideal for running, cycling, rowing, all kinds of cardio, and more, UA Sport Wireless Heart Rate feature legendary JBL Signature Sound with Pure Bass performance to give you the inspiration and motivation to finish strong. Specifications: Bluetooth: Yes; Speaker drivers: JBL 5.8 mm dynamic; Maximum volume: 111dB SPL; Frequency response: 10Hz - 22kHz; Bluetooth version and profiles: 4.2, A2DP v1.3, AVRCP v1.6, HFP v1.6, HSP v1.2; Bluetooth transmitted frequency and power: 2.402GHz - 2.48GHz, <4dBm; Bluetooth transmitted modulation: GFSK, π/4, DQPSK, 8-DPSK; Battery type: rechargeable lithium-ion (3.7V 2x50mAH); Battery life up: to 5 hours with audio and heart rate enabled; Battery charge time: Less than 2 hours; Controls: three-button controller, right earbud touch sensor; Connector: micro USB; Included: zippered pouch, charge cable, size 5, 6, 7, and 8 eartips, Color: Black