This batch feed kit from Insinkerator is the perfect accessory partner to the Insinkerator Evolution 100 and Insinkerator Evolution 200 waste disposal units. Please note that this product is not compatible with other Insinkerator waste disposal models. This batch feed kit allows the user to directly operate the waste disposal unit, without the need for an air switch. It is basically an on and off switch alternative to the air switch that is built directly into the cover of the waste disposal unit. It is a great alternative to the air switch if you do not want to make holes in your worktop, helping to maintain the smooth aesthetic of kitchen. Use of the batch feed kit also makes for quicker, easier and less expensive overall installation, compared to the air switch option due to the.