<https://www.cell2.com/product/horizon-dc-warning-stick-4-lighthead-br4/>
<http://schema.org/description>
"HORIZON DC Dual Colour (TW) Warning Mode Only, 4x12 LED Modules (RRRR/BBBB Colour Arrangement), Clear LENS, SAE Approved, Length: 447mm (17.6\"), Flash Patterns: 50 Warning, 12VDC."
<https://www.cell2.com/product/horizon-dc-warning-stick-4-lighthead-br4/>