SAE Class 1 Certified 25 Scan-Lock Flash Patterns Hard-coated lenses minimize environmental damage from sand, sun, salt, and road chemicals Synchronize to other Whelen sync products Easily surface mounts with two screws, Includes Black flange and a 4 wire 6" pigtail The ION T-Series features Linear Super-LED technology and a sleek and low profile design, with a depth of only 1/2" (13mm).