[Brand ACEFAST & Package Contents] ACE stands for first class and FAST stands for speed. ACEFAST creates bold, interesting, and transparent designs by combining new technologies, new materials, and our founder's extraordinary artistic sensibilities with continuous insight into consumer needs for a better digital new life. . Package contents: Wireless earphones x 2, charging case x 1, instruction manual x 1, SS/S/M/L earpieces x 4 (*M size is already attached to the main unit), 0.3m USB-A to USB-C cable x 1, silicone protective case x 1, advertising color page*1 (*The order number will be used in place of the warranty). We guarantee the quality of our products within 18 months of purchase. If there is a problem with the product, please feel free to contact us. Free replacement or refund is possible. [Innovative LED digital display & up to 30 hours of music playback] Innovative LED digital display, embossed 3D display, accurately displays the amount of electricity in the earphones and charging case. Fully transparent one-piece design perfectly shows the internal details, the outer transparent glass texture is simple and beautiful, and the wireless earbuds are easy to put on and take off. The charging case is equipped with an atmosphere lamp that gives it a high-tech feel. Interesting, transparent and a perfect expression of a bold design concept. When the Bluetooth earphones are fully charged, you can play music for up to 7 hours. In addition, if you use the included charging case, you can enjoy up to 30 hours of continuous playback, so you can use it all day long without worrying. The charging case also supports Type-C fast charging, allowing iPhone earphones to play music for about 2 hours with just 10 minutes of charging. (*The playback time varies depending on the volume, content being played, and usage environment) [Dual Driver Unit & Excellent Sound Quality & Best Fit] ACEFAST T8 earphones have two different sizes of the same dynamic driver, a Φ6mm treble driver + a Φ10mm bass driver placed on the same axis, allowing you to hear well-balanced sounds from bass to treble. You can. Each one is divided into roles, and combined with a wider frequency range, the sound level of the three frequencies becomes clearer, and the sense of detail becomes more prominent. In addition, it is compatible with AAC/SBC, has high sound insulation properties, and supports an equalizer that optimizes according to the volume, allowing you to reproduce music faithfully to the original sound. For those with smaller ears, we have added a pair of ultra-small ear tips. Comes with 4 pairs of ear tips (SS/S/M/L) in different sizes, so you can change them to suit your ears. (The main unit is M size) The weight of the earphone is only 11g, so the bluetooth earphone design is ergonomically compatible, so it won't put pressure on your ears even if you wear it for a long time. It is lightweight and compact, making it highly portable. [AI+ENC call noise canceling & clear calls]...