Cherry Num Keypad 21 Keys Black Usb.\n\nNUM KEYPAD 21 KEYS BLACK USB.\nWhether for numerical inputs, controls or for frequent number entry - the programmable keyboard is the ideal accessory for notebooks. All keys can be user-defined with up to 24 characters per key. Individual keys with Gold Crosspoint contacts (ML technology) Designed for continuous usage - over 20 mill. confirmations per key Numeric block with 4 additional, individually inscribable function keys High level of reliability and unique precision confirmation feeling Programming of alternative key codes e.g. [.], [,],[00], [000] Suitable for left and right-handed use Additional programming of software macros via the high-performance configuration software 'Cherry Tools' Can be used with the standard drivers of the operating system\nInterfaces/Ports\n\nKeyboard/Keypad Host InterfaceUSB\n\nMiscellaneous\n\nAdditional InformationIndividual keys with Gold Crosspoint contacts\nService life: > 20 million key operat;