D4 True Wireless Earbuds.

Connectivity: The version indicated on the box is 5.49 (likely Bluetooth 5.1 or 5.4, based on similar product listings) for fast and stable connections. Sound: They are designed to deliver HD stereo sound with rich bass, often featuring 10mm or 13mm drivers. Controls: The earbuds typically feature touch controls for managing music playback, calls, and voice assistants. Durability: They are commonly described as sweatproof and waterproof or water-resistant, making them suitable for sports and workouts. Battery Life: Expected playtime is about 4-6 hours on a single charge, with the included portable charging case providing multiple extra charges for extended use, sometimes up to 50 hours of total playtime with the case. Calls: They include a built-in microphone on each earbud for hands-free calls.