Rotor Master 550

This is a device to measure the strength of your 550 sized rotors commonly used with Drag racing.  Not the outlaw 13.5 540 motors or standard 1/10 540 motors.  Features & Specifications: 1. Reverse Polarity Protection 2. Optimized code for calibrating the offset during startup 3. Instant Reset Data Button 4. More Accurate ADC 5. Now Measures Up To 4000 Gauss 6. More Robust Cradle/Rotor Mount 7. Comes with an EVA Protective Case Power range 7-15v (2s or 3s battery, or 12v power supply) Measures 3 area of your rotor strength (left, right and middle) Measures current and max value of rotor in 3 areas OLED Screen Handcrafted in the USA! Comes with protective EVA case Tested and calibrated by me before it ships out Measuring range from 0 - 4000 Gauss Please note that you will need a power source to power on this device. This unit is not compatible with 540 sized rotors used in 1/10 racing. This unit is calibrated to my equipment and may not read the same as your equipment.  There is no standard in the RC industry for calibrating Gauss in our rotors.