George Foreman Grill, specifically one of the "Fit Grill" models,

The specific model in your image, which appears to be an older "Lean Mean Fat Reducing Grilling Machine" model, is generally found for prices on second-hand marketplaces like eBay, with used listings around €55, while new units are much harder to find.

The device shown in the image is a George Foreman Grill, specifically one of the "Fit Grill" models, which are known for their compact, space-saving design and angled plates to drain fat for healthier cooking.
Key Features
Design: Features fixed non-stick plates, a sloped design that allows grease and fat to drain away into a drip tray (not pictured), and a hinge that can float to accommodate thicker cuts of food.
Functionality: It is an electric, double-sided contact grill designed to cook food quickly and evenly from both sides simultaneously.
Identification: The specific model appears to be a smaller or medium-sized version, possibly a "Small Fit Grill" (model 25800) or "Medium Fit Grill".
Cleaning: The non-stick plates are designed for easy cleanup, often requiring just one wipe with a damp cloth or sponge.