This is a noise prevention transformer "NR11-300A" manufactured by TOYOZUMI DENGENKIKI CO. LTD. It is a high-performance isolation transformer (double winding) designed to prevent noise from entering power lines in factories, research facilities, etc., and to eliminate equipment malfunctions and noise troubles. Product Specifications: Model Number: NR11-300A Manufacturer: Toyozumi Denken (TOYOZUMI) Application: Noise prevention transformer Phase: Single-phase Primary Voltage: 100V Secondary Voltage: 100V Capacity: 300VA Secondary Current: 3A Frequency: 50/60Hz common Weight: Approximately 5.8 kg Product Condition: As shown in the photos, there are few noticeable scratches or stains, and it is in relatively clean condition. Operation has been confirmed, and there are no functional problems. Please understand that this is a used item before purchasing. Accessories: Main unit only (everything shown in the photos)