The Thermacell E55 Graphite Mosquito Repellent is a rechargeable device designed to repel mosquitoes outdoors. It is powered by a lithium ion battery and comes with a 12-hour refill cartridge. The compact dimensions make it easy to transport, and the graphite color adds a stylish touch. This product from Thermacell is EPA registered and features a durable construction, making it a reliable choice for keeping mosquitoes at bay during outdoor activities.