Product Description Mi Sports Bluetooth Earphones Mini meets IPX4 water resistance testing standards. Whether you’re running outside or at the gym, water will not get in the way.*After undergoing lab testing, the earphones were found to meet IPX4 requirements for splash protection and water resistance. The charging port's water resistant plug, however, must always be firmly in place. Water resistance may decline over time due to normal wear and tear, and damage caused by immersing the earphones in water is not covered by the warranty. Main Features: ● Only 14.5g, no burden on ears anymore ● Perfect for people who love music and sports ● IPX4 waterproof, sweat resistant and durable ● With ear-hook and hidden clamp, anti-drop ● Support volume control and song switch ● Allows pairing two Bluetooth devices simultaneously ● On-cord controller, designed on the middle of two earbuds, balances the pressure ● Reverse spraying process, added glittering and translucent decorating, exquisite appearance design ● Separate the microphone and the volume control key, more convenient in sports ● Built-in 80mAh rechargeable Li-ion battery, about 200h standby time and 5h play time ● Compatible with the system which supports V4.1 Bluetooth version ● Coupled with a waterproof storage bag, convenient to carry and good to maintain