The latest Bluetooth 5.1 technology ensure a longer transmission distance, an ultra-stable connectivity and lower power consumption than the previous generation products.Adopting ergonomic half-in-ear design, and weighting only 4g of each earbud,play time about 6hrs and standby time about 140hrs ,charge time about 1 hrs ,with own incredible comfort for long playtime and seamless sound that sits effortlessly in your ears. With physical button on the wireless earbuds, you can switch songs freely, answer/reject calls , perfect for home, office and running etc.