3. flexible keyboard (105 keys) features: 1) withstand all kinds of daily abuse 2) be made of a special high quality silicone 3) waterproof, can be dipped into and washed with soap and water 4) hot resistance, hot coffee or water can not hurt it at all 5) bright,eye-enjoyed and smooth surface,very excently hand feeling 6) fingertip hurtless, noiseless 7) it’s so flexible that you can rolling up and bring to anywhere you want to go 8) lightweight, ultra-slim, and compact 9) it fit easily in your briefcase, backpack, or notebook, do not worry about any sharp edges 10) the foldable keyboard is flat design also offer an ease in typing which eliminates negative-angle stress to your wrists