Cooper Wireless Radio PIR offers a common appearance throughout a hybrid installation. The xcelR takes two standard AA batteries available from any retailer. Battery life increased to 40 months using standard AA batteries. The radio PIR with advanced design has led to 30% range improvement. Consistency of coverage considerably improved due to the new design of spherical lens, five layers of beams and dual element sensor. Compatible with all current Scantronic and Menvier alarm panels with radio capability.