R390 wireless office vertical mouse, "vertical" refers to the vertical state in which the user's palm is close to the desktop when using the mouse. In the process of using an ordinary mouse, the user's arm moves laterally to control it, and it is easy to cause arm fatigue for a long time. Thanks to its ergonomic design, it is comfortable to hold and the arm is naturally perpendicular to the mouse, serving you for a long time. The surface of the mouse adopts exquisite micro-grinding process, which makes the hand feel comfortable and delicate. With quick volume adjustment buttons. 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. The mouse DPI is adjustable, 800-1200-2400-3200, respectively, and the USB transmitter is plug and play.