Microsoft Mouse USB IntelliPoint Mouse Microsoft ITE78CJ Since the main unit is missing, operation has not been confirmed. Please understand that this is a used item. Please refrain from purchasing if you are sensitive to used items. No box or instruction manual included. Although stored at home, it is in relatively good condition. Please check the condition in the images before purchasing. No returns or refunds after purchase. Direct purchase and immediate purchase are OK. Thank you very much.