The finest aftermarket PSU for single pattern tube microphones... Exceeds manufactures specs in most cases. These fully regulated, extremely stable and very rugid PSU's, have a lower noise floor than the original units offered from Neumann, AKG, Scheops, etc...They come with a 5 year warranty. Available for all tube mic's, regardless of tube style, (excluding Sony C800 mics). Rocker, illuminated power switch, externally fused IEC power receptacle, XLR multipin mic cable connector and pinout included.....adjustable potentiometers for internal adjustment of B+ and filament voltages, so microphone voltages can be precisely adjusted. Includes IEC 110v power cable..Can be ordered as a switchable 110/220v PSU for an additional $50.