・The Macrom 44.07 is a programmable power amplifier used in car audio systems. Product Name: Macrom 44.07 Programmable Power Amplifier Application: Power amplifier for high-quality sound reproduction in car audio systems Features: It has programmable functions, allowing for sound quality adjustment and customization of settings. ・This is a used item, so please refrain from purchasing if you are sensitive to such. Operation has not been confirmed. ・Since the photos are everything, please confirm them carefully before purchasing. ・To prevent troubles such as parts removal, returns and refunds are not possible after purchase.