TDK Head Demagnetizer Head Eraser Cassette Tape Type AH-202 Operation confirmed with LR44 battery Although the light was confirmed to be on, Please understand that this is a used item before purchasing. The TDK AH-202 head demagnetizer is designed to effectively demagnetize the heads of audio equipment. It is a product of the reliable TDK brand. This head demagnetizer is essential for maintaining the performance of audio equipment. Regular use prevents sound quality deterioration and maintains clear sound. - Brand: TDK - Model: AH-202 - Type: Head Demagnetizer Cassette case is included, but there are no instructions. Batteries are not included.