The Oppo Enco W31 are black in-ear true wireless stereo earbuds designed for a reliable daily listening experience. They feature 7 mm graphene dynamic drivers that deliver stereo sound across a frequency range of 20 to 20,000 Hz with a sensitivity of 95 dB, while the AAC codec ensures efficient audio transmission via Bluetooth 5.0 within a 10-meter range. These earbuds are built for practicality, featuring an IP54 rating that protects them against dust and water splashes, making them suitable for workouts or unpredictable weather. You can manage your music and access your voice assistant through integrated touch sensors, while the built-in noise-canceling microphone helps keep your calls clear. Each earbud is powered by a 25 mAh battery providing up to 3.5 hours of playback on a single charge, which extends to a total of 15 hours when using the 350 mAh charging case. The entire set weighs 50 g and recharges via a USB Type-C interface in about 2.5 hours. Along with the earbuds and case, the package includes a USB charging cable and a variety of ear tips to ensure a comfortable fit.