Paradox DG85 (B4U) Hardwired PIR Kit + Bracket The Paradox DG85 (B4U) Hardwired PIR Kit+Bracket serves as an advanced security solution that enhances the safety of your home or business. This high-performance kit features a Passive Infrared (PIR) sensor that detects motion with remarkable accuracy. You will receive alerts for any unauthorized movement in your vicinity, ensuring your property remains secure. The hardwired design guarantees a reliable connection, reducing the risk of interference or power issues common in wireless systems.