This portable table top diffuser insect repellent is universally tested proven effective to repel insects in and area over 200 to 300 square feet. One cartridge will repel insects for up to 120 hours. A vapor seal zip lock bag is provided for cartridges when not in use. Can be used indoor or outdoor. Repellent produces a pleasant natural fragrance and is safe for children and pets. Battery operated. 3 AA batteries, not included. DEET free. Includes one cartridge.