500ml can of Flamingo A/C Pro Air Conditioner Cleaner, a specialized foam cleaning agent formulated to remove bacteria, mold, dust, and odors from air conditioning systems.Directions for UseThis product can be used for both vehicle and household air conditioning units:1. For Auto Air ConditionersStep 1: Locate your vehicle's external air inlet. Start the engine, turn on the air conditioner to its highest fan setting, and adjust the climate system to external circulation (fresh air mode).Step 2: Shake the can thoroughly. Attach the included narrow extension tube to the spray nozzle and spray the cleaning foam directly into the external air inlet.Step 3: Turn off the air conditioner and let the vehicle sit for 3 to 5 minutes to allow the foam to dissolve accumulated grime and trap contaminants.Step 4: Turn the air conditioner back on.