EX-35T's unique 'Flip-Lens' design offers either a 35'x35' wide angle detection pattern or a 55'x5' long range pattern. With high quality Spherical Lens design and 64 zones of coverage (wide angle), EX-35T has the highest performance of any detector in its class. EX-35T also features a built-in Pet Ally adjustment, selectable pulse count, and optional mounting brackets. EX-35T has twice the features of other PIRs, at half the cost.