The JBL Live Flex 4 are open-fit wireless earbuds designed for comfort and ease of use. Unlike traditional in-ear models, these earbuds sit outside the ear canal, offering a lightweight and relaxed fit that is suitable for long periods of wear. They include active noise cancellation (ANC), which reduces background noise during activities like walking or working in an office. However, because of their open design, some louder sounds may still be heard. The earbuds also have a transparency mode, which allows users to hear their surroundings more clearly. A six-microphone system helps ensure clear voice calls, even in noisy environments. The JBL Live Flex 4 come with a smart charging case that features a touchscreen. This allows users to adjust ANC settings, equalizer (EQ) preferences, playback options, and other features directly from the case, without needing to use their phone or other source device. Additional features include speech adjustment for clearer calls, the ability to toggle spatial audio for a more immersive listening experience, and tools like a timer and flashlight. The JBL Headphones app offers further customization, including the option to set a custom wallpaper on the case and support for the LDAC codec, which provides higher-quality audio for compatible devices. Battery life for the JBL Live Flex 4 is rated at 7 hours with ANC enabled, 10 hours with ANC disabled, and up to 48 hours with the charging case. The earbuds also support wireless charging. In terms of sound quality, they deliver a wide, spacious soundstage and strong bass, though they may not match in-ear models in deep bass response. With the default Studio EQ, the sound is balanced, and minor EQ adjustments can improve the low-end performance. Released in May 2026, the JBL Live Flex 4 are priced at £179.99 (about $240 / AU$340), similar to the previous model, the JBL Live Flex 3. Their main competitor is the AirPods 5 with Wireless Charging, which is slightly cheaper at $149 / £149 / AU$219. While the AirPods 5 offer similar ANC features, they lack the smart charging case and have shorter battery life. Another alternative is the Huawei Freebuds Pro 5, which provides a proper in-ear seal, better noise cancellation, and a wider frequency range. The JBL Live Flex 4 are IP54-rated for dust and water resistance and are available in a variety of colors. While their design is not the most luxurious, the curved earbuds and high-quality case finish are visually appealing. These earbuds are best suited for users who prefer an open-style fit and value the convenience of the smart charging case. However, they may not be ideal for those seeking the highest sound fidelity or the most effective noise cancellation, as in-ear models like the Bose QuietComfort Ultra Earbuds Gen 2 or the Huawei Freebuds Pro 5 offer better performance in these areas.