Wonderful wireless car shaped mouse. Best choice for showing your logo. Such optical mouse is designed with reliable optical technology, convenient to use. Intelligent connectivity,no need to code,plug-and-play. The unit uses 2 AAA batteries(not included). * Nonfunctional head lights. Add head light to each mouse are free. Front head lights is optional with no additional charge. Complies with Prop 65. 4 1/2" W x 2 1/4" H x 1 1/2" D