The Off! Clip-on Fan Circulated Mosquito Repellent is a convenient wristband that provides 12 hours of protection against mosquitoes. It features a refillable design and is suitable for use both indoors and outdoors. The fan helps to circulate the repellent and keep mosquitoes away, making it a practical choice for camping, hiking, and other outdoor activities. With its odorless formula and sturdy plastic construction, this product is a reliable solution for staying bug-free while on the move. 2010 package - may need batteries replaced.