The all digital TruTach II works on production aircraft as well as ultra-light and homebuilt applications with no connection to the aircraft necessary. It's usable inside or outside the cockpit for convenient operation and measures RPM at any power setting. It works on single or multi-engine propeller aircraft having 2, 3, 4, or 5 blades. Only two controls: on-off and blade quantity select. Never needs adjustment. Check calibration anytime with a standard light.
Specifications: 1 lbs (0.5Kg) shipping weight.