The A4Tech B27 are true wireless stereo earbuds designed for an active lifestyle, featuring a secure SportsFit design that keeps them in place during workouts or outdoor activities. They utilize 2Drumtek Signature Sound and 10 mm hybrid diaphragm speaker units to deliver a balanced audio experience with deep bass and clear trebles across a frequency range of 20 Hz to 20 kHz. Connectivity is handled by Bluetooth v5.2, ensuring a stable wireless link up to 10 meters with your phone, tablet, or laptop. These earbuds are built for convenience and durability, featuring an IPX4 water resistance rating that protects them from splashes and sweat. The elegant grayish white design is complemented by a charging case with a transparent cover, which houses a 400 mAh battery. Together with the 40 mAh batteries in the earbuds, you get a total playtime of 22 hours, consisting of 5 hours on a single charge and an additional 17 hours from the case. Both the buds and the case recharge quickly via a USB Type-C interface in under 1.5 hours. Managing your media is simple through touch controls that allow you to skip tracks, handle calls, or activate your voice assistant. For a personalized fit, the package includes three sizes of ear sleeves and two sizes of ear wingtips. The lightweight 41 g build and the ability to use a single earbud independently make them a practical choice for those who need reliable audio throughout their day.