Advance Transformer Panasonic Microwave 8997n11-8 B621C925 120V AC-200-Y. Condition is "Used" & was in a working microwave - I don't know how to test it, but I have a multimeter & will test per your instructions if desired. I will *usually* ship the same day, but please allow 3 business days for shipping. You must ask any questions before hitting Buy-It-Now!