1. Scissor structure, chocolate keycaps ,Silk printing 2. Crystal clear acrylic upper and lower case 3. Ultra thin design, Most thick is up to 9mm 4. Saving space, comfortable to use,easy to carry 5. Mini USB Receiver port 6. LED : Lower Power indicator LED 7. Botton Trip: 2.5mm 8. Keylife: 100 million 9. Compatitable with Windows ME,2000/Vista/XP/7 Package Size:475*310*20mm G/W: 8.3KG