Features: 1) Made from silicone rubber, environmentally friendly and ideal for resistance against drink or food spillage at home or at work, can be cleaned with standard household cleansers 2) Soft-touch, quick tactile key action protects your fingertips with excellent fingertip feeling, improves your typing speed, easier to use than hard keyboard 3) Light weight, space-saving, roll-up for easy storage, saving desk space 4) The colorfast printed letters won't come off even after a long period of time 5) Over 20 languages available, special language layout of keys depends on your requirements 6) No noise while typing, silent keys for normal and special occasions, such as libraries, offices, hospitals, bedrooms, military, and traveling 7) Excellent and various in colors, OEM orders acceptable with your own logos and designs for promotion 8) Can be used in dark environment without opening lamps 9) Durable (guarantees one million keystrokes) 10) Compatibility: IBM, Windows 98/2000/Me/XP 11) Communication: USB, PS/2, USB+PS/2 12) Dimensions (L x W x H): 495 x 135 x 15mm 13) Layout: 109 keys 14) Electronic data: 5V DC, 250mA 15) Total travel: 2mm &plus minus4 Certificate: CE & RoHS Packing Info: QTY: 20pcs G.W: 8.3Kg MEAS: 37.5*32*42.5cm