Bright optical mouse uses radio frequency technology and DPI function. The DPI button makes it possible to quickly change the sensitivity of your mouse. Includes wireless USB receiver. Compatible with Windows and Mac operating systems. Media device not included. 0.75" H x 2.313" W x 4.5" L. Imprint area is 1.13" H x 2.00" L and includes a 1 Colour Imprint on 1 Location. Packaging: Individually Gift Boxed.. Please call for rush delivery availability or multi-colour/multi-location imprints.