... , 2.Stable performance,convenient to use. 4.High-brightness, Digital engine Tachometer for boat and vesselType.:diannao typeDescription:(1) Installed ... , auto and other instruments.(2) Adopt superior and fully digital optoelectronic martials, using imported SCM as the core, with ... supply:8~32V.3.working temperature: -10~80°c;4.display device: digital display tube of high brightness.Appilicable:200-10, ...