The HUAWEI FreeBuds Pro 4 earbuds come with a dual speaker, intelligent active noise cancellation technology, and a 55 mAh battery for each earbud. Audio Specifications and Design Speaker: Dual speaker system featuring an 11mm dynamic driver and a planar diaphragm driver. Audio Technology: Supports HUAWEI Sound technology and high-resolution audio transmission. Dimensions and Weight: Each earbud measures 29.1mm in height and 21.8mm in width, with the charging case weighing approximately 47 grams. Available Colors: Black, White, and Green. Battery and Durability Battery Capacity: 55 mAh for each earbud (minimum value), and the charging case has a capacity of 510 mAh. Water Resistance: The earbuds are splash, water, and dust resistant with an IP54 rating (while the charging case is not water-resistant). Features and Control Noise Cancellation: Intelligent and dynamic active noise cancellation (ANC) technology. Controls: Supports head gesture controls and press-and-hold for rejecting/answering calls and managing audio. Connectivity: Connects to two devices simultaneously.