The Raycon E45 Fitness earbuds feature enhanced fit ear pieces for a more comfortable and secure fit. Add in 3 sound profiles, 54 hours of playback time and a waterproof design, and you'll have a workout buddy that will keep you driving throughout your workout. These earbuds also feature TWS True Wireless Stereo technology, which provides significantly better overall sound quality and better connectivity. And TWS means the two earbuds can be used separately or together. With these waterproof and comfortable Fitness earbuds, you can dance or sweat freely in the rain while staying focused and feeling strong through every repetition.