PRODUCT GRADING Refurbished Pristine > Minor if any signs of use and wear > Refurbished to the highest standards. Retail Box WHAT IS IN THE BOX JBL Under Armour Wireless In-Ear Headphones with Heart-Rate Monitor PRODUCT DESCRIPTION Styled in black 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. PRODUCT INFORMATION Product Type - Earphones Bluetooth  Colour - Black Protection - Sweat-resistant Audio - Output Headphones Form Factor - In-ear Headphones Technology - Dynamic Connectivity - Technology Wireless Wireless Technology - Bluetooth Bluetooth Version - Bluetooth 4.2 Frequency Response - 10 - 22000 Hz Diaphragm - 5.8 mm In-Cord Volume Control - Yes