Marine Tachometer, Rectangular Computer tachometer, 1.diesel engine tester 2.for boats/ships 3.arround 1kg 4.high quality A micro-computer tachometer,marine tachometer,Rectangular Computer tachometer,diesel engine tachometer designed to be used with ships, automobiles and other instruments, has the advantages of stable performances and convenient use.Its main technical data include: 1. Input ...