i have 2 large and 1 small. the 2 large have remotes and work. the small one doesn't. i couldn't get a video to upload so i will add a link to a youtube video. you might have to copy and paste the link in your browser. i am holding my phone and trying to run the remotes and keep in mind i don't know what i am doing, but they do work. they are used and show some wear and some marks. i think the Robosapien has the original Sunbeam batteries? the battery compartments are clean and don't have any corrosion. the please look at the pictures as they are part of the description and feel free to ask questions.