Reliable & Efficient: Nail light fungus device combined with 470nm blue light and 910nm invisible light, safe and reliable, 7 minutes at a time, your nails will be more beautiful. Compact & Lightweight: The device is fairly compact, made of a nice hard plastic material. Lightweight and small enough to carry around. It is perfect travel size. Ease of charging: That is very easy to charging. Just plug the device into a usb port with the provided cable to charge.The battery life is very long. Still, it is recommended to recharge it after 5-6 uses. Charging time is around 90mins. Keep your nails short: When trimming your toenails, cut them horizontally and keep toenails shorter than the ends of your toes. Sterilize the nail clippers before using. To disinfect nail clippers, wash them with soap and water, then wipe them with alcohol. Warm Reminder: Before you use the product for the first time, please make sure it is fully charged. It is best to charge it for 90 mins.