Lenovo HE05 is Equipped with an 8mm drive to deliver stunning sound for an enjoyable listening experience. Comes with a Built-in large-capacity battery for up to 12 hours of working time and 7 days of standby time. It works with Bluetooth 5.0 chips to ensure a 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 storage. This Lenovo HE05  earphone has no Warranty.