Bluetooth 5.0 technology deliver high-fidelity audio IPX7 Waterproof: Sports Earbuds Design, Internal nano-coating protects the headphones from heavy rains or sweat throughout intense exercises Comfortable and Stable: Lightweight and ergonomic design Long Play time: Great battery life achieved by an upgraded and improved lithium polymer battery that charges fully in less than 2 hours and can hold a charge for up to 8 hours Quality service: 1-Year Manufacturer's warranty and 30 days no-questions-asked return policy.