View on LOZ Suggested Retail: $39.98. Flowtron BK-40D Electronic Insect Killer, 1 Acre Coverage,Black. Flowtron's lantern-style insect killer uses nontoxic ultraviolet light to eliminate mosquitoes, biting flies, and other insects over a 1-acre area. The insect killer is cleaner and safer than its chemical counterparts, and its patented non clogging killing grid eliminates the grid clogging that can short-circuit the unit or cause flare-ups of insect remains. The insect killer features high-impact construction and a protective outer enclosure to prevent children, pets, birds, or wildlife from contacting the charged grid.. 7 CALENDAR DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.