CarbMate TS-111, Carburetor / Fuel injection throttle body synchronizer SYNCHRONIZED CARBURETORS - On V-twin, opposed 'boxer' twin or parallel twin motorcycle or aircraft engines. ADJUSTABLE RESOLUTION - Accuracy of 2  0.5cmHg guarantees accurate synchronization, result displayed on 9 LED panel. POWERFUL VOLTAGE - Powered from external 12V or vehicle/craft's 12V battery. INDUSTRIAL GRADE - Motorola pressure transducer, rugged solid state electronics. INCLUDED - ABS instrument case with durable polycarbonate labels, fuel & oil resistant rubber hoses.