Dynex Keyboard and Optical Mouse DX-WDCMBO - Keyboard - PS/2, USB - 104 keys - mouse Mouse features 2-way scroll wheel and 2 programmable buttons Includes both wired keyboard and optical mouse. Model: DX-WDCMBO 123-key keyboard includes 19 hot keys Detachable palm rest Avago 1610 wired optical technology gives the mouse a 1000 dpi ability