USB Numeric 10-Key Slim Keypad (Black) USB Numeric Keypad General Features: Black keypad USB interface 18-key layout 5V operating voltage Plug and Play Hot-Swappable Slim design Retractable USB cable (expands to 29-inches, retracts back to 2.5-inches, approximate) Ideal for laptop users Keyboard Layout: Num Lock key / key key - key 7 key 8 key 9 key + key 4 key Backspace key