Take the guessing work out of your Prop and Motor Combos, know whats going on with your setup.Ever wanted to know how fast your motor is spinning? Wished you could better select the right propeller for your motor?Now you can more accurately tune and performance test your engine, motor, edf or heli with the GT-Power tachometer.Specifications

Measures 2 to 9 Propellers
Very Easy to Use
RPM Range: 0 – 99,999RPM
Ultra sharp backlit LCD
Spare battery included
Auto shut-off when not in use. (no more flat batteries)
Weight: 39grams