for DC 4.8-6V Mini 3 Modes Digital Servo/ESC Consistency Tester Steering Gear Measurement for RC Helicopter Airplane Car Tool Overviews: 1.This Digital Servo Tester is with high accuracy. 2.You can test control 4 servos at the same for time and change the test modes as you need. 3.With rotary potentiometers, you can decrease or increase the width of the output pulse. Features: 1.Test Together: can be synchronized output control 4 servos. 2.Accurate Test: used to compare the performance steering gear control of the steering servo output signal can be accurate to 2us (1 milliseconds = 1000 microseconds), you can test the steering gear is able to respond to subtle changes. 3.PPM Signal: with PPM signal test function in the display, the input PPM signal changes while the input the PPM signal synchronization output to the servo Energized automatically enter manual mode (Manual) 20us 50H analog servo signal cycle, frequency 50Hz. 4.Adjustable:rotary potentiometers to decrease or increase the width of the output pulse. 5.3 Modes:S-1 manual mode (Manual)/S-2-bit mode (Neutral)/S-3 automatic mode (Automatic) Specifications: Material: Plastic Input voltage: for DC 4.8~6V Output signal width: 800~2200us Button the Select (Note: the for key switch function, circulation patterns) 1. S-1 manual mode (Manual) 2. S-2-bit mode (Neutral) 3. S-3 automatic mode (Automatic) Keys pulse width: 1. 50H analog servo signal cycle 20us frequency 50Hz 2. 125H digital the steering gear a signal cycle 8us frequency 125Hz 3. 250H Digital Servo signal cycle 4us frequency 250Hz Item weight:29g Item Size: 40*75*25 Notice: Carefully read the instruction before any use, if you are a beginner, it\'s advisable to be assisted by an experienced adult. Package List: 1 x Digital Servo Tester / ESC Consistency Tester