Dragon Egg LED Backflow Incense Burner, Backflow incense flows down through a backflow burner and creates a mist around the product. This item must be placed on a heatproof surface. When backflow incense burns the mist it creates can leave a light residue on the burner and the surface the burner is placed on. This is from natural oils and resins within the incense and can be wiped clean with a damp cloth. Never leave burning incense unattended. Material: Resin, Metal, Plastic and IncenseFor Use With: Backflow Incense Cones OnlyBatteries Required: 2 AABatteries Included: NoIncense Included: Yes - 1 Backflow ConeApproximate Burn Time: 30 Minutes per ConeSold in random colours ONLY