The two glare-free lighting heads are fully adjustable and can rotate up to 355 degrees for multiple aiming positions. The emergency battery backup consists of a sealed maintenance-free lead calcium battery that charges during normal operation. When a power failure occurs, the electronic circuit on this LED exit sign senses this and automatically switches to battery power for up to 90 minutes of uninterrupted service!Once power is restored, the unit switches back to normal operation. A "push-to-test" feature allows you to check for proper operation of this feature. This combination exit sign emergency light requires a 120-volt electrical connection. It is ETL Listed and UL Listed for damp locations. Dimensions (approximate): Width: 22" (including lights) Height: 10" Depth: 3. This item meets the electrical product safety standards imposed by the ETL, a division of the Intertek Group, for use in the United States. This item has been tested and meets safety standards imposed by the Underwriters Laboratories (UL). The item "4 Exit Sign and Emergency Light Combination with Battery Backup (120V)" is in sale since Thursday, March 22, 2018. This item is in the category "Business & Industrial\Facility Maintenance & Safety\Safety Signs & Traffic Control\Exit Signs". The seller is "usasupply1" and is located in Miami, Florida. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Viet nam, Uruguay.