BEP Pro Installer 400A EZ-Mount Battery Selector Switch (1-2-Both-Off) [771-S-EZ]Pro Installer 400A EZ Mount Battery Selector Switch (1 2 Both Off) As easy as 1, 2, 3, these revolutionary battery switches allow you to wire from the front. Never has installation been so easy and cabling so accessible. With their shared interconnection height, EZ Mount battery switches "cluster" directly with the Pro Installer Busbar Range, resulting in the fastest, most compact installations. Optimized cable access makes installation a breeze. Pro