Horizontal auto transfer switch 30 A, 120V, 10 NEMA 5-20R receptacles, two LEDs power-on indicators with two 20 A single pole magnetic breaker on-off switch with integral switch guard, and dual 10' power cord with NEMA L5-30P twist lock plugs. UL and c-UL Listed. Power Feeds A and B must be Phase Synchronized. Dimensions: 1.72"H x 17.0"W x 9.0"D (44mm x 431mm x 229mm) .. see full description