Bosch's Remote Starter Switch allows one person to start or crank the engine from under the hood - ideal for a compression test or bumping the piston onto Top Dead Center (TDC) position for valve, distributor, or camshaft adjustment. This remote switch is designed to replicate the function of the original vehicle ignition switch, not carry full battery power for starting - correct hook-up is essential to prevent severe damage to the switch. This rugged unit features a power tool type trigger switch; comfortable ergonomic handle; heavy-duty, 5-1/2 foot long neoprene leads, and 1/2 inch opening clips with insulated boots. Works with 6V and 12V systems. 10-amp rating. Includes comprehensive hook up instructions with illustrations for safe and correct hookup.