Mini Silicone 18 Key Number Keyboard Pad with Retractable USB Cable Foldable Soft Waterproof Roll Up Silica Gel Computer Desktop Keyboard for PC Laptop Notebook (Blue) Silicone Material,Durable,Waterproof,Dust Proof can be wiped down with a sanitizer wipe Number keypad with 18 keys; USB interface with retractable cable Excellent for notebooks & laptops without a number pad Compatibility: IBM,Widows 98/2000/ME/XP/VISTA/7/8 Features a Calculator hotkey for quickly bringing up the calculator program,Excellent for notebooks & laptops without a number pad.