Adopting high keycap ladder design, this keyboard has sensitive typewriting, reduces error and provides comfortable hand feeling. Simple blue monochromatic backlight function will make your keyboard distinctive and create a peaceful feeling for you while working. It is constructed of plastic material. The length of the product is 118.7mm, the width is 80.7mm and the height is 40.4mm. It is suitable for laptop/tablet user, cashier desk, bank, etc. Item Name: Keyboard Material: Plastic Operating Life: 50,000,000 Times Working Voltage: +5V Plus or Minus 5% Use Maximum Current: 100mA Interface Type: USB2.0 Connection with Computer: Wired Operating System: for Win 2000/XP/for Vista/for Win7/8/10 Keyboard Type: High Keycap Ladder Design Number of Word Keys: 21 Keys, Two-color Keycaps Features: Ergonomic, Portable, Blue Backlight Size Details: 11.87cm x 8.07cm x 4.04cm/4.67" x 3.18" x 1.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Keyboard