1Multifunctional Tester: This precise power meter is used to evaluate RC battery charging efficiency, measures the power and energy consumption of any battery operated device. 2Precise Calculation: The meter predicts the flying time of the model aircraft and choose the best propeller or the most efficient motor. 3Safety Assurance: Check wiring and connector power loss to ensure peak current is safe for motor, ESC and battery, as well as wiring and connectors. 4Backlit Function: With backlit function, long press the button for 5s to turn on and off, the backlit settings can be saved when the power is turned off. 5Wide Application: The multifunctional high precise meter is equipped with digital LCD screen, easy to read data, suitable for RC remote control car, boat, aircraft battery.