The London Fogger has been designed with safety and reliability in mind. Every unit is equipped with the exclusive Auto Extract System (AES) that extracts fluid from the heating module after smoke production. The AES prevents residual buildup, clogging, and reduces incidental puffing. Each unit comes complete with a remote control on a 50 foot extention cord to make that next raining exercise go extra smooth. And with the AES, you are guaranteed that the first puff of smoke won't be the last.