The Milo Wireless Mouse is a bright optical mouse that uses a radio frequency technology with a DPI function. The DPI button makes it possible to quickly change the sensitivity of your mouse. It includes a wireless USB receiver and is compatible with Windows and Mac operating systems. Complies with Prop 65. 0.75" H x 2.313" W x 4.5" L. Imprint Area is 1.13" H x 2.00" L. Please call for rush delivery availability or for multi-colour, multi-location imprints.