Bluetooth 5.0 Technology: Equipped with most advanced Bluetooth 5.0 technology, the wireless earbuds can ensures more stable and secure connection, which brings you ultimate auditory enjoyment Up to 15hrs Playtime: Upgrade wireless headphones version, 120mAh battery gives you up to 15 hours of playtime, no need to worry about the recharging problem when workout in the gym or running outside HD Stereo Sound: Rich dynamic bass offers wide range of sound. 11mm copper speaker and act supported wireless headphones bring HD stereo sound for superb music appreciation IPX7 Sweat Proof Design: Internal Nano-coating material protects the earphones from heavy rains or sweat throughout intense exercises, which makes the earbuds more durable and sturdy to use Excellent Noise Cancellation: Relater's latest RCA technology enables clearer phone calls; comes with 4 sizes of ear tips that bring universal fit, you will get superior sound quality, passive noise cancellation and enhanced bass