... 4. adjustable DPI optical mouseProduct Name:optical mouse without space limitationItem No.HC-Y-09Product Size:10.5*6.5 ... + color box, or as your requestFeature:Off-table, no space limitationGood for arm ache and wrist acheComfortable touch feelingBatteryBuilt-in ... same buttons. Our advantages:optical mouse1. Off-table, no space limitation2. Innovative design, plug and play3. Compatible with Windows95/ ...