The Potter Amseco HUB-T is a dual hold-up button that provides two sets of momentary or latching DPDT contacts for actuating surveillance cameras or other security applications, in addition to the hold-up signal.The two sets of contacts of the HUB-T may be used independently of each other, or they may be wired in series with a jumper wire for additional protection against false alarms. Also known as -Potter Electric Signal Mfg Us 2-BTTN SEL LTCH/ MOM DPDT - PL-HUBT