For sale are two Nobels passive DIs. The chassis can be linked, allowing multiple units to be placed side-by-side. Being passive, no external power supply is needed, making them useful for small-scale PA, band rehearsals, home recording, etc. I own several units, and I'm selling some of them. Thank you for your consideration. - Input: 1 - Output: Balanced out x 1, Unbalanced out x 1, Parallel out x 1 - Attenuator switch: 0/20/40 - Phase switch: 0°/180° - Ground switch: On/Off - Dimensions: 4.5 x 10.5 x 7.5 cm