PLUG AND USE. Simply plug the keyboard into a USB port on your computer, and it will be immediately usable. No need to install drivers! SWITCH LIFE. 3 million cycles, with a membrane switch with tactile feedback from the key switch to give a fast response and low-noise keys. 19 KEYS. 19 Full-sized keypad, clearly distinguishable number keys that are low-profile; great for data entry and improved accuracy. On the numeric keypad, there is a backspace key and a number lock. DURABLE & LONG-LASTING. All our products are made to last with high-quality materials and exceptional care. For your peace of mind, each Sandberg Numeric Keypad also comes with a 5-year warranty and is double-quality tested. TECHNICAL SPECIFICATIONS. The Sandberg USB Wired Numeric Keypad is compatible with Windows 11, Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and MacOS. USB interface. Connector USB-A male. Cable length: 1.5 metres. 19 Keys. Num lock LED indicator. Key switches: Membrane switch with tactile feedback. Switch Life: 3 million cycles.