CALCULATOR FUNCTION AND KEYBOARD FUNCTION: This wireless numeric keypad is a 2 in 1 device, and it has calculator function and keyboard function, long press NUM to switch between calculator mode and PC keyboard mode. 20 INDEPENDENT BUTTONS: This USB numeric keypad has 20 independent buttons with backspace key, convenient and quick to input and modify, the F on the display is always on in the calculator mode, and the on the display is always on in the PC keyboard mode. PORTABLE AND WATERPROOF: Small and portable, it can be placed in the bag at any time, suitable for notebooks, desktop computers, and financial forms. Built in drainage design, when a large amount of water splashes on the keyboard, the surface of the keyboard can drain the water instantly, which is safe and worry free. 2.4G WIRELESS CONNECTION: This mini number pad supports 2.4G wireless connection, stable transmission distance of 6‑10 meters, plug‑and‑play without driver, convenient and quick to use for notebook and desktop computers. INTELLIGENT POWER SAVING: Intelligent power saving. It will go to sleep after 5 minutes of inactivity in the two modes. You can only wake up by pressing the on/c key in the calculator mode, and just press a key in the PC keyboard mode. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.