Wireless Keyboard and Mouse Combo, LeadsaiL Compact Quiet Full Size Wireless Keyboard and Mouse Set,Wireless Mouse DPI 1600 in 3 levels- You can easily change the cursor sensitivity of this cordless mouse depending on your activities;usually 800 DPI for office, DPI 1200-1600 for 4K resolution monitor or entertainment like gaming at home. 2 polling rate: 125Hz and 250Hz; adjusted by pressing the right key and the wheel simultaneously at 3s for change.