The JBL Wave Flex in black are true wireless stereo earbuds featuring a stick-open design that sits comfortably in the ear. They utilize 12 mm drivers and JBL Deep Bass Sound to deliver a frequency response ranging from 20 to 20,000 Hz, providing a rich audio experience with a sensitivity of 105 dB and 16 Ohm impedance. These earbuds connect via Bluetooth 5.2, supporting HFP, A2DP, and AVRCP profiles for stable wireless performance. You can enjoy up to 8 hours of playback or 4.5 hours of talk time on a single charge of the 40 mAh batteries, while the 500 mAh charging case extends the total battery life to 32 hours. The case charges via a USB-C port and takes about 2 hours to reach full capacity. Designed for daily versatility, the earbuds are IP54 rated, meaning they resist both dust and water splashes. Each bud weighs only 3.8 g, and the compact black charging case weighs 35.1 g, making them easy to carry in a pocket. A built-in microphone with -38 dBV/Pascal sensitivity allows for clear voice calls.