Features: It is made of high-quality aluminum alloy , anodized, which is durable , safe , and reliable. It can test analog and digital servos, as well as control ESC. When testing three servos simultaneously, whether they are synchronized or not, this feature is primarily designed for CCPM mode . With 3 modes for servo or ESC testing. Manual mode : Turn the knob to display the servo response rate. Neutral mode : revert the servo to a neutral point . Automatic "wiper" mode : servo swings at the largest angle. It can combine 1-3 servos simultaneously to test synchronization and consistency. In addition, it can connect 1-3 ESCs to properly test and compare their response time. It can connect 3 servos of CCPM helicopters to customize the helicopters and select the servos according to neutral position and synchronization function. You can also connect the aircraft servo , as well as install the control box and adjust the aircraft controlled by neutral mode . . Servo Tester Servo 3 Channels 3 Fashion ESC RC . Servo Tester Servo 3 Channels 3 Fashion ESC RC Specification: Material: metal; Color : shown as pictures Input Voltage : DC 4.8-6V Size: Approx . 48*42*17mm/1.89*1.65*0.67inch Weight: 28g Type: access to RC model parts List of packages: 1 * servo tester ; . Servo Tester Servo 3 Channels 3 Fashion ESC RC . Servo Tester Servo 3 Channels 3 Fashion ESC RC