LiftMaster LA400DC Residential Swing Gate Openers Secondary 24VDC Single Actuator (Arm Only) Not Control Panel Included Secondary 24VDC Single Actuator (Arm Only) Not Control Panel Included Simultaneously closes gates at the same time Selectable gate hold/open feature. Ideal for parties or for holding gate open for extended period of Provides simple method to manually operate gate Selectable settings allow gate to auto open upon loss of AC power or battery depletion