<https://www.directionalsystems.com/products/hospital_signs/in_use_and_safety/38865>
<http://schema.org/description>
"Product #38865 from In Use and Safety - This SBLF Series IN USE indoor, LED backlit sign features a block-style message that is readable without illumination. The message is viewable when off and can ..."
<https://www.directionalsystems.com/products/hospital_signs/in_use_and_safety/38865>