I replaced the brain for my astra 777. Now when my alarm is tampered with all activity becomes inactive. The only function I have is if I get within inches of my antenna I can unarm it. I also have the LCD two way transmitter and since I put my new brain in it will only arm, remote start, and release my trunk it won't disarm or unlock my car. The regular transmitter has all functions
Vehicle Parts & Accessories - Astra - Scytek ASTRA 7T7 Alarm Security System w/ LCD Remote Control