Pre-wired, flush mount module that combines the 113553 battery selector switch and a 140 amp dual sensing Voltage Sensitive Relay in an aesthetically pleasing, modular housing. Operation is identical to 113654 on page 158. Panel fastening is concealed by interchangeable clip-on strips (light grey is supplied as standard) and clip-on cover at rear ensures ABYC compliance of the installation. Supplied with one interlink joiner enabling simplified system expansion.