Descriptions:

Item Name: Servo tester
Material: Aluminum alloy
Channel: 3CH
Input voltage: DC4.8-6V
Output: 15mA (5.0)
Output signal: 1.5ms±0.5ms
Size: Size: 48mm*42mm*17mm
Net Weight: 30g
Package Weight: 45g

Item Name: 4 Cell AA Battery Holder
Each holder holds 4pcs AA batteries
Voltage: 6V
With JR connector
Works great for RC, such as servo tester

Features:
There are 3 modes:
1.Manual mode: turn the knob with different speed, check the reaction time.
2.Neutral mode: make the servo go back to the neutral point.
3.Automatic "window wiper" mode: make the servo swing like a window wipers in the biggest angle.
Great for servos applications:
It can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on.
Great for ESC applications:
You can also connect 1-3 ESC to test and compare their reaction time respectively. The device also can be used as a signal generator for electric speed controller (ESC). With it, you can test your motor system without using a transmitter and receiver.
Great for CCPM applications:
It can connect 3 servos of the CCPM helicopters and select servos.
It can also connect the servo of airplanes install the steering-box and adjust planes by using such as the neutral mode and so on.(With LED indicators)

Package includes:
1 x 3CH Servo Tester
1 X 4 Cell AA Battery Holder