201074 Sterling International YJDS-BB4 DecoShield Yellowjacket Repellent Device, Repels Wasps, Hornets Yellowjackets, Reusable, Backyard Safe, No Poisons, No Spray, No Smoke Device That Protects 300 SQFT Area, Smells Pleasant Can Sit Or Hang, Lasts 5-7 Days, For Refills Use Decoshield Why Refill #DS-WHYR-DB12.