The OFF! Clip-On Mosquito Repellent Unit + 12 Hour Refill in white and gray is a convenient outdoor solution for repelling mosquitoes. With an EPA registration number of 4822-542, this refill lasts for 12 hours and is designed for outdoor use. Made of plastic and weighing just 0.0016 oz, it is a lightweight and portable option for camping, hiking, or any outdoor activities. The repellent method used by OFF! helps prevent mosquito bites, making it a must-have for any outdoor enthusiast.