Homeda Camping Mosquito Repellent Bracelet Electric Ultrasonic Mosquito Repellent Wristband Non-Toxic Feet Free, Eco-Friendly for camping and hiking. This is a portable bracelet that doesn't need a charger or any extra accessories in order for it to work. If you do not want to wear it as a bracelet or wristband you can remove the body and clamp it on to your cap, shoes, bag or clothes and turn it on. The bracelet or body is reusable.. The electrical repellent is powered by a replaceable button cell. The bracelet is an eco-friendly and healthy option since it is odor free feet free, non-profit and is safe to use. This is a good product that I would definitely recommend since it is safe to use around kids and pets.