Features: 1. It is very convenient to detect and set the virtual bit, jitter and median of the server. 2. This servo tester can connect two sets of servos or ESC 3. The tester has good stability and high accuracy 4. You just need to turn the knob, then detect the servo. 5. It is very useful for testing the governor or motor performance. It is equivalent to a "manual receiver" function, which simulates the transmitter rudder through the knob. Specification: Condition: 100% Brand New Output: ≤ 15mA (5.0) Input: DC 4.2-6.0V Output Signal: 1.5ms ± 0.5ms Adjustment Method: Manual, Automatic, Median. Weight: Approx. 9g / 0.3oz Size: Approx. 46 * 32 * 15mm / 1.8 * 1.3 * 0.6in Package List: 1Pcs Servo Tester