EASY TO USE Comparing with other products, its light is closer to white light, which does no harm to eyes and skin. Fashionable and durable 50000 hrs lifetime, ideal for personal use and best gift for friends. PROTECT YOUR EYES AND SKIN Gently press the button then it will dry the nail polish, there are two timing functions inside, short press is work for curing 45 seconds, long press is work for curing 60 seconds, the time up will automatically go out.