The Adesso AKB-618 Easy Touch Waterproof Ergo Keypad offers desktop and notebook users the benefits of a full-sized external numeric keypad in a compact size, featuring 18 quiet membrane keys.The membrane switches inside each key feature a 5 million keystroke lifecycle. Innovative and portable, the Adesso AKB-618 is designed for those on the go, notebook users, point of sale, kiosks, accounting and financial institutions, libraries and more! Even casual gamers will appreciate the precision of the keypad.