The design guide discusses the reference design hardware and firmware implementation. The document starts with the basic operations of a computer mouse peripheral followed by an introduction to the Avago ADNS-3530 low power optical mouse sensor, the Nordic Semiconductor nRF2402 transmitter and nRF2401A transceiver, Texas Instruments MSP430F1222 microcontroller. The software section of this application note describes the architecture of the firmware required to implement the mouse and the USB dongle functions. Included in Appendix A is the schematic for this reference design mouse and USB dongle.