Polishing and power flexibility AC demagnetization polishing method is used for polishing, including permanent magnet polishing and DC polishing, delivering a clean and thorough finish. The power supply includes a rectifier circuit and supports both AC input and DC input, providing flexible operation. Advanced magnetic head and dualfunction design Adopts TA7668 magnetic head recording and playback dedicated chip design (disassembly chip, do not take photos if you mind). Built around an oldfashioned magnetic tape drive with a card holder magnetic head amplification dedicated system. Dual use for playback and recording, enabling both listening and capturing audio from magnetic media. Recording input and compatibility The recording signal input can be connected to the audio output of devices such as computers, mobile phones, MP3 players, and other sources for recording. Use scenarios and applications Scenario 1: Archive and preserve audio content by recording from a computer, phone, or MP3 player onto magnetic tape, then store for longterm access. Scenario 2: Polishing and demagnetizing permanent magnets or magnetic components in a workshop or lab setting, taking advantage of the AC and DC polishing options. Scenario 3: Playback and testing of legacy tapes with the dedicated playback path, and recording from external audio sources to magnetic media for comparison or restoration work.