Brand new, unused! Instant purchase welcome! Color: Black [Industry-Leading Bluetooth 5.4 Technology - Connect by Opening the Lid] Adopting the latest Bluetooth 5.4 technology, the power-saving and connection stability have been significantly improved compared to the previous generation Bluetooth 5.0 chip. The lag between video and audio during video viewing has also been greatly reduced from the previous model, enabling smooth gaming and video viewing experiences. [Up to 42 Hours of Playback & Clear LED Display] The earphones have a large-capacity battery, and with an energy-saving design, the earphones themselves can last for 6-8 hours on a full charge, and up to 42 hours with the charging case, so you don't have to worry about running out of battery while storing them. A rapid charging Type-C port is adopted, so the charging speed is significantly faster than the conventional Micro USB. Even if the battery runs out, you can get about 60 minutes of playback with about 10 minutes of charging. It's also very convenient when charging, no troublesome operations are required, and you can plug it in either way. With the popular LED power display indicator, it overflows with a sense of luxury in blue, and the remaining battery level of the charging case is displayed numerically on the LED display, in increments from 100% to 1%, and the earphones can check the charging status with a 4-segment LED display. [Delivering Better Sound Quality & Microphone for Calls] To pursue "the richness of the original sound," the earphones are equipped with a specially designed 15mm large-diameter driver, which produces good sound graininess and crisp music. You can enjoy a wide range of sounds, from powerful bass to natural mid-range and clear high-range, achieving uncompromising high-quality sound and faithfully reproducing the original sound. [Best Fit, Palm Size] Designed by scanning the shape of thousands of people's ears and analyzing the results with cutting-edge algorithms, the earphone body is designed to fit snugly in the ear while adjusting to the optimal sound quality. [Waterproof Performance & Recommended Reasons & Reliability Guarantee] With IPX5 waterproof performance, it is a splash-proof specification that is resistant to sweat and water splashes, so you can use it with confidence even if it gets wet from sudden rain or sweat from intense exercise. Applicable to all weather conditions. 2200r9010