1Uses safe germicidal UV light technology, can kill up to 99.9% of bacteria quickly. 2Use for sterilizing the metal nail art tools. Such as tweezers, nail nippers, salon peelers. 3Made of aviation grade aluminum materials for long time use. 4Built-in high-performance lithium battery, charging 30min, 8 hours long battery life. 5Charged by USB cable, more economical and environmentally friendly.