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• 5.8mm Dynamic Drivers
• 10 Hz to 22 kHz Frequency Response
• Bluetooth 4.2
• Built-In Rechargeable Battery
• Up to 5 Hours of Audio with Features On
• TwistLock Ergonomic Eartips
• Inline 3-Button Remote & Touch Sensor
• On-Board Microphone
• On-Board Heart-Rate Tracking
• Included Micro-USB Charging Cable

JBL Under Armour Wireless In-Ear Headphones with Heart-Rate Monitor

Styled in white and designed with athletes in mind, the Under Armour Wireless In-Ear Headphones by JBL are a pair of Bluetooth earbuds featuring 5.8mm dynamic drivers, a sweat-proof IPX5 design, and a rechargeable lithium-ion battery; with the on-board heart-rate tracker enabled, the battery can last up to five hours off a single charge.

Its in-line three-button remote, offering play/pause, volume, answer/reject, and skip-track parameters, provides universal control over iPhone and Android devices, while an on-board microphone supports phone calls. Also, these earbuds offer patented TwistLock ergonomic eartips intended to aid in comfort and security; with these earphones, the buds should never slip out of your ears until you choose to dislodge them. Included with these headphones are a carrying case, four sets of ergonomic eartips, a micro-USB charging cable, and a 12-month premium membership to MapMyFitness Premium, an app which helps you monitor your health and workout progress.