Please Note: if you aren't using a Whelen Cencom Sapphire, Whelen Cencom Carbide, or Whelen Cantrol Siren Control System, you'll want to purchase this product for ease of installation:

For WeCan - Whelen WCCP Wecan Universal Control Point

Whelen Inner Edge Interior Lightbar XLP, DUO WeCanX, Chevy Tahoe 2021+, Blue/White, BW54UFX-EE

XLP WeCan® DUO™ Super-LED® Upper Front Facing Series
Extra low profile with six or twelve 6-LED DUO modules DUO gives you independent control of each color, for a dual purpose warning and take-down light.
The XLP Duo WeCan models mount on the upper front of Chevy Caprice, Suburban, Tahoe & Silverado; Dodge Charger, Durango & Ram 1500; Ford Explorer, F150/250/350, Fusion, Police Interceptor Utility & Taurus/Police Interceptor Sedan.

Arriving on scene in the middle of the night? Smoke or bad weather clouding your visibility? Not a problem with new DUO dual color Inner Edge lightheads on board. DUO gives you complete independent programming control of each individual lightheads warning color (Red, Blue or Amber), plus you can turn your entire lightbar into a take-down light. This take-down mode is controlled in groups of 3 White DUO lightheads. 
With its tiny 3/4" profile, XLP Inner Edge DUO fits snugly against the windshield, providing much more visibility and headroom for the driver, while virtually eliminating flashback.

Below is a Video of Whelen XLP SOLO Inner Edge in an Interceptor SUV

WeCan Operation
XLP WeCan DUO series models feature six or twelve 6-LED DUO Super-LED lightheads, with two color combinations in each LED module, controlled by an external interface unit, the WeCan Electronic Control Module (ECM). The ECM communicates all lightbar operating functions via a 2 conductor, 20 gauge cable to the lightbar. The WeCan Programming Software, loaded by USB input to the ECM from a PC or laptop, for easy programming. 
All functions are programmed via simple “pick & click, or drag" WeCan Programming screens on a Windows® based XP (or later) operating system (a default program is pre-installed).