Perixx ergonomic vertical optical mice perixx perimice 713 this wireless vertically oriented mouse has a right handed ergonomic design that greatly assists in reducing injuries caused by unnatural arm position features 5 buttons and a scroll wheel and the resolution is switchable between 100015002000 dpi the mouse has a power onoff switch and there is a usb nano receiver for pc connection perixx perimice 713 wireless ergonomic vertical mouse