SDU2.0 is a programmable ECU chips that is being used in eSilver Edge Gear Box

Simply pressing down the button underneath of the gear box, user can switch its fire selector modes (total 5 different modes). No external device or trigger control are needs, it is easy to program anytime and anywhere by the user.

First, connect your AEG with a fully charged battery (7.2 ~ 11.1v) Battery. The usaual battery that you used when your play Airsoft.

Second, find the switch button. The button is located underneath of the gear box reachable from the magwell of the lower receiver.

How to change the mode?

Step 1) Press and hold the button. You will see a Red LED light on, hold till you see its blinking 2 times, release the button to accept the changes. Repeat Step 1 to continue your choice.

Choice of Firing Mode:
Mode 1 – Safe -Semi -Auto (default)
Mode 2 – Safe -Semi -3xBurst
Mode 3 – Safe -2xBurst -Auto
Mode 4 – Safe -3xBurst -Auto
Mode 5 – Safe -3xBurst -9xBurst
Double click the button or unplug the battery anytime to reset the ECU back to its factory settings (Mode 1)