It might need a slight adjustment. There is a bit of red paint on the right side of his nose/cheek and he is a little dusty. The prop moved when I pushed the purple button in the bottom platform and it worked with motion too.
I'm not sure where the sensor is but it came on when I went to unzip his collar. The item "Life Size Animated Gemmy Michael Myers Halloween H2O Prop" is in sale since Sunday, June 10, 2018. This item is in the category "Collectibles\Holiday & Seasonal\Halloween\Current (1991-Now)\Props". The seller is "sdrappers" and is located in San Diego, California. This item can be shipped to United States.