Lenovo HE05 Equipped with 8mm drive to deliver stunning sound for an enjoyable listening experience. Comes with Built-in large capacity battery for up to 12 hours of working time and 7 days standby time. Its works with Bluetooth 5.0 chips to ensure stable and fast connection. Here, IPX5 waterproof rate can keep the rain and sweat far away. Its ergonomically designed earphones for long-time comfort. It has CVC noise-canceling microphone & magnetic design for easy store. This Lenovo HE05 earphone has no warranty.