The 7D SURFACE/DIN RAIL MNT W/BAT BU 120V 7-Day timer modules are designed to be mounted inside a control panel and can accommodate flush/panel mounting. The time switches are light-duty commercial switches ideal for 120 VAC single phase applications, such as lighting control, HVACR, pumps, motors, fan controls, access controls, OEM applications, agricultural facilities, and general purpose electrical circuits.