Warm Tips: 1. Asimebesty U V LED Nail Lamp you just need to open the on/off button then can be use, 3 timer settings, and an LED display screen for clear visibility of time and power. 2. If there are stains on the surface of the gel polish curing lamp, wipe it with a cleaning pad, and do not clean it directly with water. 3. It is normal for gel nails to be slightly warm when curing with LED nail lamps. 4. If the U V Nail Lamp is used for an extended period of time, the U V Lamp will heat up and can be turned off to cool down. 5. Some special colors of gel nail polish, such as black, white, etc.. The curing time should be longer (120 seconds). 6. This pen uv nail lamp is perfect for quick fixes, if used for full-hand nail art it will take longer to complete. 7. Do not use damaged USB cables to avoid potential risks! 8. Do not allow water or other liquids to enter the single UV lamp as this may cause the machine to malfunction. 9. Keep your eyes away from LED nail lamps.