This is a dedicated phono equalizer amplifier compatible with domestic authorized dealer MM (MV) type cartridges. It comes with a Japanese manual from the authorized dealer. The design and texture are good, and it is a high-quality amplifier. If your record player has a built-in phono equalizer, you can use this amplifier if there is a switch to turn off the built-in equalizer. Also, even if your amplifier has a phono input, you can enjoy it by connecting it to AUX, etc. It performs accurate equalization to the RIAA curve of the record and outputs the signal. Features: ・Input capacitance can be switched between 100 and 200PF to match the cartridge. ・Low-cut filter can be turned ON/OFF. ・Output gain can be adjusted. The output gain is especially convenient and useful. Adjustment is easy with the clipping LED. The lamps are also beautiful, doubling the enjoyment of playing records. The input can use the original AC/AC adapter, or it can also operate with a 12V DC adapter (see photo 3). There are no visible scratches. All accessories at the time of purchase are included. I am selling it because I replaced the cartridge of my player with an MC type. Personally, I think it is much higher performance than domestic brands with low gain and no adjustment knobs. ※Common to all phono equalizers, a 1m RCA cable is optimal between the record player and this unit. Connect the GND if available. Thank you.