The X3 Pro by TREBLAB provides clear sound and deep bass with its 11mm drivers so you can have fun while working out. These Bluetooth headphones with microphone can pair with any device within a 33ft range so you can keep running and have fun while working out. With easy-to-use controls on each earbud, it's easier to answer calls or change tracks right in the gym. These earbuds also rest securely around your ears with no-slip hooks. Focus on what you're doing, not on wires, not on earbuds falling out. The X3 Pro earbuds can last for up to 9 hours on a single charge longer with 4 additional charges with the charging case so you never run out of power.