... With 18 hot keys silicone waterproof keyboard,flexible keyboard, silicone keyboard,waterproof keyboard,foldable keyboard,usb keyboard,multimedia keyboardSuper slim ... color for our silicone keyboard Layout: 131keys waterproof keyboard.. Size: 420x135x8mm Weight: 210g Electronic data: +5V DC ... applications for our waterproof and dustproof keyboard, including Hospital Office Factory Laboratory Library ...