Mini In-ear Comfortable Design: Designed around the human ear contour, an in-ear that is truly comfortable and lightweight Baseus Dual Channel Low-Latency: Enable low latency mode to enjoy AV synchronization and audio smoothness Baseus Rapid Charge: Up to 2 hours of battery life with just 10 minutes of charging 25 Hours Long Battery: Large-capacity battery, up to 25 hours of playback time with the charging case Wireless 5.3: Exceptionally Fast & Smooth: Upgraded wireless 5.3 with improved stability and efficiency for a smoother audio experience