The Thermacell MR450 armored portable mosquito repeller effectively repels mosquitoes by creating a 15 feet zone of protection. This small rugged device can be taken virtually anywhere to repel pesky mosquitoes, stopping them before they can bite or bother you. The MR450 includes some unique features to make it our most advanced portable repeller yet. Features: Added features include: rubber armored, zoneCheck, belt clip, quiet ignition, reengineered grill and switch, improved ergonomics, and accessory mounting system ZoneCheck provides a visual indication when zone of protection is created Ideal for repelling mosquitoes from the backyard to the great outdoors Portable, lightweight No spray and no mess, scent-free and deet-free No open flame, no smoky candles 12 hr of protection included