Feature: 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 \u003d 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. 4. Adjustable: Rotating potentiometer can reduce or increase the output pulse width. 5. 3 Modes:S-1 manual mode (Manual)/S-2-bit mode (Neutral)/S-3 automatic mode (Automatic) Specification: Features： Test Together: can be synchronized output control 4 servos. 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. 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. Adjustable: Rotating potentiometer can reduce or increase the output pulse width. 3 Modes:S-1 manual mode (Manual)/S-2-bit mode (Neutral)/S-3 automatic mode (Automatic) Specifications： Color：Black Material: Plastic Input voltage: DC 4.8-6V Button the Select (Note: the 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 Size：7.5cm * 3.6cm * 2.3cm / 2.95 * 1.41 * 0.90in Weight：33g / 1.16oz Package List： 1 * Digital Servo Tester / ESC Consistency Tester Package List: 1 * Digital Servo Tester / ESC Consistency Tester