All functions have been tested and confirmed. This model is from 2014. There are no noticeable stains on the exterior. We will ship after cleaning, but please understand that some stains may remain due to the nature of the product. Below are the manufacturer's specifications: SHARP RE-S5B-B BLACK Brand: Sharp (SHARP) Color: Black Installation Type: Countertop Material: Ceramic, Alloy Steel Body size: 450 x 365 x 290mm Body weight: Approximately 13kg Material: Steel plate Power supply: AC100V (50Hz-60Hz compatible) Rated power consumption: Range 970W (50Hz)・1,300W (60Hz), Oven 1,180W, Toaster Grill 1,180W