Slim and Thin Design-JOYACCESS wireless desktop keyboard has all keys in scissor-cross low profile structure;which maks it ulra-slim(keystroke travel 2mm),resposive and less noise.The portable mouse is also built-in in newest noise-free switches for quiet click.Both keyboard and mouse give a world of silence and a morden desktop; great for conference, board presentation, library, coffee shop, night work, travel, etc. HIGH PRECITION DPI 2400 in 5 levels- You can easily change the cursor sensitivity of this cordless mouse depending on your activities;usually 1600 DPI for office, DPI 2000-2400 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 CONVENIENT & FAST OPERATION-Type fast with numeric keypad and instant access your music,internet,e-mail,volume,etc by multi-media hot keys. The hot-keys not fully compatible with Mac System The keyboard and mouse combo