Item Type: Wired Earphone Material: PVC Model: MS21 Color: Black Plug: Type C Impedance: 32 Ω Frequency: 20Hz-20KHZ Rated Power: 5mW Line Length: Approx. 1.2m/3.9ft 1、Convenient to Use: Hands free in line microphone allows you to answer or reject phone call. While driving, play or pause and adjust the volume when listening music. Easily access to use on the go.  2、Comfortable to Wear: Thanks to ergonomic design with ear canal and skin friendly material, fitting auricle design, make you more comfortably when wear in the ear throughout the day.  3、Noise Isolation: Noise canceling design to maintain high fidelity audio output, no matter how noisy the environments, you can enjoy your superior lossless music completely.  4、Premium Material: The headset is made of high quality PVC material, strong tensile resistance, durable; Length 2m/9ft, easy to use. Fine workmanship, superior performance, quality assurance, to bring you more inexpensive enjoyment.  5、Flexible: Anti wrap oxygen free copper wire inside provides the whole USB C earbuds flexibility, make you not only easily walk through backpack and clothes while moving outside activities but also easily business trip.