Not sure but the motion sensor doesn’t work at all. Tried 3 different sets of battery and still will not work. The indicator lights imply it’s set and should work but it doesn’t. 

Given the amount of batteries needed I don’t think it’s worth the automated feature to open and  close not the price. 

Since you can manually open and close the can I decided to keep it and use it in my laundry  room where an automated feature wouldn’t be required.