It shows signs of use, but there are absolutely no problems with its operation or sound quality. The rubber pads on the back have been replaced with DIY ones. Quoted from the sales site below: Simple and natural sound, the ideal DI with no noise. It outputs a wide frequency range from 10Hz to 40kHz without any coloration or phase distortion. ■ Direct Box ■ Passive Type ■ The world's best DI The JDI is a high-performance passive direct box for live concert tours and professional studio recording applications, featuring premium Jensen transformers for superior audio performance. ■ Features Passive DI with Jensen transformer Eliminates hum and noise caused by ground loops Almost zero phase and harmonic distortion Excellent signal processing capability and noise reduction ■ The pure sound of the instrument The Radial JDI is a passive DI box designed to handle extreme signal levels without distortion. The JDI uses the world's best Jensen JT-DB-EPC audio transformer, achieving a smooth, warm Bessel curve reminiscent of vintage equipment. With a completely flat frequency response from 10Hz to 40kHz and boasting almost zero phase deviation, the JDI delivers the natural sound of the instrument without unnecessary coloration. The power-free passive design converts high impedance to low impedance and balances the signal via a magnetic bridge, transmitting the signal as is while eliminating unnecessary DC voltage. This provides excellent performance in effectively eliminating hum and noise caused by ground loops.