Sleek aluminum mesh finish ideal for high-visibility locations, and works on door frames or walls. Door Detective is a doorway-mounted tailgate detection and direction control system that further secures an access-controlled door. Few people are comfortable shutting the door on people following behind them, yet employees and tenants are burdened with that decision every day. Door Detective places security enforcement back where it belongs – with your access control system and security personnel. It’s like having a guard at any door.