Airsoft ETU SEMI control unit from manufacturer Delta Armory. ETU SEMI unit does not have FULL AUTO function.

ETU stands for electronic trigger unit, which means electronic trigger unit.

The ETU SEMI unit allows the following functions to be set:

Pre-cocking - spring preload - faster response when the trigger is pulled

Battery connector.

Take a picture of the QR code attached to the wiring harness and visit the page for instructions on how to set up the ETU unit.

Features Table:

Weight: 23g