The SX-360Z'S unique zoom system makes it the most flexible detector available in the market today. The 276 dense zones will provide a 60ft.(18m) circular detection area at any installation height from 8 to 16ft.(2.4 to 5m) with absolutely no dead spots. The SX- 360Z's compact design makes it the perfect detector for all types of applications-residential and commercial, large and small.