This was removed from a fully working Stannah 420. It’s NOT the main board OR the IR board so I’m guessing it controls the turn on the chair but I’m not a Stannah engineer so it’s a guess.
Stannah 420 Infrared Modules
Stannah 420 Rail Fixing Set with Screws
Stannah 420 Track End Cover Top
Stannah 420 Hinge Box
Stannah 420 Plastic Cover
Stannah 420 Key and lock