This pack of 4 easy-to-read electrical alternative energy labels with symbols is self-adhesive for easy, permanent installation - just peel and stick. The orange background clearly displays English text, printed in color. Use these vinyl OSHA labels with a WARNING header to make your industrial notices message clear. A clear protective laminate layer is applied to these labels. This item is UV, chemical, abrasion and moisture resistant and is suitable for use at temperatures from -40 to +176 F. ComplianceSigns products are made in the USA and commonly used in industrial, commercial, public and private settings. Full text: DANGER SECONDARY POWER SOURCE CONNECTED BACKUP GENERATOR INSTALLED