IPX5 Waterproof & Sweatproof: With your headphones' IPX5 waterproof rating, you can work out without worrying about sweat or rain. Comfortable Wear & Ergonomic Design: These earphones are comfortable to wear for extended periods of time because they are ergonomically designed for a secure fit. Clear Calls & Intelligent Noise Reduction: Take advantage of intelligent noise reduction to make sure your voice is heard clearly during calls. 12 Hour Battery Life & Quick Charging: Ideal for prolonged listening sessions, this device can be charged in just 1.5 hours and remain charged for 12 hours.