Plug and Play: No complicated pairing required. No drivers or pairing procedures needed. No delays and interruptions, just plug in the included 2.4 GHz USB receiver adapter from the back of the Numpad and slide the ON/OFF switch to any computer/laptop. When you turn on the numeric keypad, the Tab key's LED indicator will light up automatically, so all numeric keys start working immediately. Note: The receiver is inserted into the keyboard's battery compartment. Fast Response, Portable: The numeric keypad uses the latest high-strength scissor foot switch design, which can withstand more than 2 million strokes, fast response, accurate control, good elasticity, and reduces pressing noise. Our number pad is only 87g, the portable design makes it easy to store in your bag for business trips. Tip: Power supply with 2 x AAA batteries (not included). Ergonomic Design: Ergonomic 15° tilt design, fits your hands easily to prevent fatigue. 4 non-slip pads on the back provide optimal comfort and keep the wireless number pad securely in place. The NumLock key is activated by enabling the cursor and screen control key functions. When you press the NumLock key, the Tab key's LED turns off to indicate that the additional shortcut functions are activated. All numeric keys will no longer work. The Tab key's LED must be on at all times for the numeric keys to function properly. Automatic Sleep Mode: The wireless numeric keypad automatically enters sleep mode after 10 minutes of inactivity to save power and energy. Press any key to wake up the keypad within 5 seconds. Fast data transmission, maximum range up to 32.8 feet. (Tip: The computer's sleep mode will cause the keyboard to enter sleep mode. After you start the computer and wait for 5 seconds, the product can be used normally). Wide Compatibility: The wireless number pad works with laptop, notebook, desktop, PC computer, etc. Compatible with operating systems Windows 2000 / XP / Vista / 7 / 8 /10/11. Tip: Home and End keys: you need to "turn off" "Use text cursor to navigate pages" in your browser settings for it to work.