The C4120  and mouse set adopts ergonomic design, the character surface adopts UV printing process, and has 12 multimedia keys, which can meet the needs of business office, greatly improve the operation efficiency, and ensure a longer service life. The mouse DPI is adjustable, ranging from 800-1200-1600, which can meet the needs of business office. Whether you are studying in a quiet office, or studying in the library, or working late at night, it will create a comfortable environment for you. Suitable for office, home, outdoor leisure and entertainment, etc., it can easily cope with various occasions, and the comfortable and soft touch coating will make you happy for a long time. Available in black and white 2 colors. The USB transmitter is plug and play and can serve you for a long time.