Helicopter Optical Tacho Digital

It is a must have tool for any pilot, and can measure RPM of any rotating object, such as all kinds of helicopters, fixed-wing airplanes with propellers and multi-copters. With high accuracy, fast response, compact size, ergonomic design and easy operation, this Optical Tachometer makes pilots have more fun!

RPM Range:700-4500RPM
Accuracy:±1RPM
Power supply:CR2032 button battery
Weight :45g
10 level aperture adjustment
5 preset RPM value
Rotary dial for RPM value adjustment
LCD display