Specifications: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. You can test if 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 PPM signal synchronization output to the servo. Energized automatically enter manual mode (manual) 20us 50H analog servo signal cycle, frequency 50Hz.Adjustable: rotary potentiometer to decrease or increase the width of the output pulse.3 Modes: S-1 manual mode (manual)/S-2-bit mode (neutral)/S-3 automatic mode (automatic).Button Selection: (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.Item Name: Digital Servo TesterMaterial: PlasticInput Voltage: DC 4.8-6VOutput Signal Width: 800-2200usFeatures: Portable, ESC Consistency Tester, Easy to UseSize: 7.5cm x 3.6cm x 2.3cm/2.95" x 1.42" x 0.91" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Digital Servo Tester