The Oppo Enco Air 4 (ETEE1) in Silky White is a pair of wireless earbuds designed for a balanced listening experience. They feature 12.4mm dynamic drivers that cover a frequency range from 20 to 20KHz, while active noise cancellation helps you stay focused by reducing ambient sound by up to 32dB. Connectivity is handled by Bluetooth 5.4 with AAC and SBC codec support, ensuring a stable wireless link within a 10-meter range. These earbuds are built for long-term use, weighing only 4.2g each for a comfortable fit. The IP55 water resistance rating means they can handle sweat and splashes, making them suitable for active days. You can enjoy up to 12 hours of music on a single charge with ANC off, extending to 43 hours when using the 440mAh charging case. When noise cancellation or transparency mode is active, the battery provides 8 hours per charge and 28 hours in total. Charging is straightforward via a USB Type-C port, with the earbuds reaching full power in 60 minutes and the entire set in 80 minutes. The compact case, measuring roughly 66.6mm by 51.2mm, keeps the total weight around 46.2g, allowing you to carry your music easily in a pocket or small bag.