Mainspring single watch winder. Model Nubeo X MS-WIN-SAT-02
Stunning piece of kit, really shows off a high-end watch (Rolex not included!)
Full details here:
Satellite Single Slot Watch Winder - Galaxy Silver
Instruction manual (similar model):
NUBEO MS-WIN-SAT-01 Mainspring Satellite Watch Winder Instruction Manual
Comes with 3 x AA batteries (installed), mains adapter & USB-C cable.