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. Specification Material: ABS + Aluminum Alloy Case Battery: 320mAh Earbuds Battery: 30mAh Bluetooth: V5.4 Transmission Range: 10m Speaker: 13mm Frequency: 20Hz-20KHz Impedance: 32±15%? Sensitivity: 104±3 dB Charging Port: Type-C Charging Time: 1.5 Hrs Playtime: 4 Hrs Features ANC TWS 4 HRS Playtime 25dB Noise Reduction High-Definition Microphone Aluminum Alloy Case Type-C Charging