The FW2010 is a simple but high quality 2 input, 2 output four wire box with IFBs. Switchable open talkback on output two. Both four wires operate as IFBs without loss of four wire inputs. Talk keys momentary (down) and latching (up). Rear panel switch to defeat key latching. LED talk key indicators. LED VOX indicators. Auto speaker off when headphone jack inserted. Earth lift switch. Rear panel speaker off switch. Selectable 12 volt phantom power on mic XLR. Rear panel multiturn mic output level trimmer Rear panel speaker on/off switch.