how about universal add on talking alarm? its easy to add in your original alarm. when u turn on the switch it said "Turbo on" when lock the alarm system it said "system on" when off "system DisArm" when siren mode on "stand back alarm system active" only For RM 280
Currently the double signal button malfunction after I open it up. I tried to put it back, but it doesn't work after that. Please show some proper instruction to fix it please ><"