The unit comes complete with an adjustable low vacuum safety sensor fastened to a NEMA 12/13 mountable enclosure and a 1/4" hose barb with approximately fifteen (15) feet of vacuum hose to tie into the vacuum line (near the vacuum chuck). The unit operates on 115V, single phase and has an alarm buzzer and red light to indicate a loss in vacuum pressure. In addition, the unit has an On/Off Switch to by-pass the alarm when the vacuum workholding system is not in use on your machine. This unit does not have an E-Stop tie-in function to shutdown the machine tool. Recommended for a single vacuum line only.