Thermacell says:

Turn it on... mosquitoes gone! The Thermacell MR300 Portable Mosquito Repeller is light and portable enough to take virtually anywhere outdoors, and creates a 15ft x 15ft protected mosquito-free zone, stopping them before they can bite or bother you. Its cordless, lightweight design makes it ideal for use while camping, fishing, gardening, and around the backyard.

- Lightweight & portable
- Silent & scent-free
- No open flame
- Easy operation

Includes: 1 MR300 Protector, 3 Heat-activated Mats & 1 Butane Cartridge