Expand your notebook's features with a compact and responsive portable numpad that will be ready to go whenever you need it thanks to the impressive battery life of up to three months. Highlights: - Numerical pad with 21 keys - AES-128 encryption - Industry-leading scissor-switch keys - Dedicated productivity keys (calculator, tab, equals, Esc. keys) - Rechargeable, get up to three months of use on just one charge (may vary according to use) - Supports Lenovo receiver for unified pairing