This document is an operating instruction for Sony Corporation's MZ-RH1 MZ-M200 Hi-MD Walkman® Portable MD Recorder. The document mentions precautions for fire, electric shock, and moisture, and warns against placing liquids or lighted candles on the device. The document also mentions safety precautions when using optical instruments and a warning about replacing the battery. Finally, the document mentions the disclaimer of liability and the regulation of disposing the battery used in the product.