Green Lion ZINC X Metal Earbuds TWS with ANC is meant to provide a thoroughly engaging audio experience with advanced noise canceling technology and a sleek, durable design. By adopting ABS + alu alloy construction, these earbuds promise endurance and premium looks. In fact, with a 25dB reduction in noise, this ANC will allow you to hear crystal-clear sound even within noisy surroundings. These earbuds have Bluetooth V5.4 and a 10m transmission range that connect continuously and seamlessly without interruption. Because of the 13mm speaker, you'll experience rich audio from a frequency range of 20Hz-20KHz. Enjoy 4-hour playback, fast Type-C charging (1.5 hours), and a high-definition microphone for superior call quality. The chic yet durable aluminum alloy case makes these earbuds perfect for office and casual use.