DELUX M618 Plus Wired Blue Version Optical Mouse Ergonomic Vertical Mouse 1600DPI, 1600DPI Wired1. High end optical engine, precise positioning. 2. DPI: 600 1000 1600DPI 3. Switch Life: 3 million cycles 4. Button: 4 buttons with scroll wheel 5. Ergonomical design, comfortable touch, long term use without fatigue 6. Intelligent connectivity, plug and play 7. Built in PAN3509 chip Specification: Package Weight One Package Weight 0. 36kgs 0. 79lb One Package Size 20cm * 15cm * 13cm 7. 87inch * 5. 91inch * 5. 12inch Qty per Carton 12 Carton Weight