Battery Holder Description:
Type: 4 Cell AA Battery Holder
Material: Plastic
Rated Voltage: 6V
Cable length: About 15cm
Cable Color: red and black
Battry Case Color: Black
For battery type: 4pcs AA batteries (AA batteries are not included).
Interface: JR Plug
Size: 56*30*29mm
Weight: 10g

GT Servo Tester Description:
Material: Aluminum Shell
Input: DC 4.8-6.0V
Output: 15mA (5.0)
Output signal: 1.5ms±0.5ms
Size: 47*43*15mm
Weight: 28g
Color: Blue

Function:
There are 3 modes to check servos or ESC:
Manual mode: turn the knob with different speed, check the reaction time.
Neutral mode: make the servo go back to the neutral point.
Automatic ''window wiper'' mode: make the servo swing like a window wipers in the biggest angle.

It can connect 1-3 servos simultaneously and test such as 1-3 servos consistency and so on.
You can connect 1-3 ESC to test and compare their reaction time respectively.
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.
you can utilize this servo tester for operating your ESC when installed in the aircraft without the need of a receiver With LED indicators.

Package Includes:
2pcs 4 Cell AA Battery Holder
1pc Servo Tester