Sufficient Quantity: headphones class set contains 100 pieces, each bulk in-ear headphones wrapped individually in bag, whose sufficient quantity are suitable for use as class set of headphones for students to meet demand Trustworthy Quality for You: the in-ear earbud are made of soft silicone and are comfortable enough to sit on the ear, and don't have a built-in microphone; Providing clear sound that does not feel jarring and is suitable for your everyday use