GTR181 Electric Lock 15 April 2024 06:49 Updated Download the PDF version of the installation manual below. GTR181 electric lock.pdf 300 KB Download Related articles GTR182 Battery Photocell Choosing the Best Access Controls for Your Automated Gates & Garages GTR502/503 Installation Manual GTR099 Installation Manual GTR156 Installation Manual (6-dip switch 2023 onwards)