EFFICIENT AND EASY TO USE All you have to do is to insert two AA batteries or attach a 3V adapter. (Both are not included.) Then touch the pressure-sensitive base plate to activate the fan. SAFE FOR YOU AND YOUR KIDS This nail fan does no harm to eyes, hands and feet. Offers maximum safety to your adorable daughter and granddaughter who are fond of doing nails. Best birthday or holiday gift. SPACE-SAVING AND DURABLE Its small size enables you to put it into your backpack, shoulder bag, handbag and suitcase conveniently. You could enjoy the manicure anytime anywhere with your family. Usage Tips: This nail fan is designed for drying regular acrylic nail polishes only. Please note that curing requirements vary based on the polish brand and thickness of the polish application. Ensure that your polish is compatible before purchase. We recommend applying multiple thin layers over one thick layer.