This Over-The-Range Microwave Charcoal Filter traps grease from the exhaust air of your oven to prevent it from entering the blower and vent, potentially causing build-up and damage. This is an accessory that can be used with several brands; check to see if your model number is compatible. Installing this accessory will require basic hand tools, some disassembly of the microwave and novice repair experience. You must unplug the microwave or shut off the house circuit breaker for the appliance before installing this part.