1) To save power, the three function indicator lights will automatically turn off after 3 seconds of long illumination;
2) Keyboard for the number lock (Num), caps lock (Caps), scroll lock (ScrLk) keys provide an independent indicator, click a key, the three indicator lights at the same time to show the current state, light prompts 3 seconds after the automatic extinction, intuitive and energy-saving;
3) When the battery is low, the low battery indicator will flash to remind you to replace the battery in advance.
