Bakker Elkhuizen Evoluent D Small - Vertical mouse - right-handed - 6 buttons - wired. The Evoluent D is a vertical mouse. Its design was inspired by years of experience and research. The mouse reduces and prevents discomfort because it is held in a handshake position. This means the wrist bends less from side to side and the lower arm rotates less. The Evoluent D is made from high-quality materials to create a premium look and feel. Furthermore, this mouse has a very short acclimatization time.