Stereo Unbalanced Analog Input and Output
The Sonore Analog Attenuator is a passive volume control with virtually no noise or distortion, implemented by a stepped attenuator with 47 steps of 1.5 dB each. Featuring ultra low noise, 0.5% precision resistors, a Swiss made gold contact rotary switch, high-quality gold plated RCA jacks, internally wired with single crystal copper wire in teflon insulation, with an 18 gauge pure silver ground bus for low impedance ground return.
Manufacturer's product page: https://www.sonore.us/attenuator.html