Work as a regular number keyboard with ultra mini design, super-thin key caps, elegant shape, comfortable hand feel. Quality silicone gel applied to effect springiness, long life. High dust proof, can be used in the sandstorm. Perfect for travel, school or any other work environment. Waterproof and washable, ideal companion for your laptop. Air touch Number Keyboard, durable and strong, silent type-no sound! Mildew and waterproof Wash at any time, washable and hygienic Dustproof, can used in the sandstorm situation Mini digital Waterproof Keyboard with 18 keys: 0-9 number keys, Del, Enter, Caculator, Num Lock, etc Super thin key caps, elegant shape, comfortable hand feel Quality silicone gel applied to effect springiness, long life Compatibility: IBM Windows 98/2000/Me/XP/Vista Communication: USB 2.0 interface Layout: 18 keys Retractable USB cable of the Orange Silicone Keyboard is 70cm long about. Dimension of the USB Vista Keyboard: L132 x W91 x H5.5 mm Input voltage: 5V 250mA Weight: 107g