This is the only cordless device that uses CO2 (created by propane to mimic human breath), octenol, and a battery powered thermoelectric module to virtually eradicate mosquitoes over an area up to one acre, eliminating the need to string an electrical cord across your property. The silent, odorless, easy-maintenance trap runs day and night. Once mosquitoes approach the propane source, they are drawn in by octenol, a close-range attractant, and vacuumed into the removable catch basin, where they dehydrate and die. Scientifically proven to control mosquito populations longer and better than candles or harsh chemical sprays, and similar to devices used by government agencies and leading universities, the trap has also proven effective on no-see-ums, biting midges, black flies, and sand flies. The trap controls biting insects for up to three weeks with a standard 20 lb. propane tank, and it features lightweight, weatherproof PVC and plastic construction and large wheels for easy mobility. Includes one octenol cartridge and two ground stakes. Four C batteries (not included) power the thermoelectric module for a full season. 36" H x 13" W x 18" D (24 lbs.)