Check the listing for details. Keystone LED Emergency Back-Up Driver (DRIVER ONLY) (KT-EMRG-LED-5-500-K1). Condition: New – Open box. Listed at 30.00 USD. This Keystone LED Emergency Back-Up Driver is designed to provide power to LED fixtures during power outages. It is compatible with Keystone LED fixtures and can be easily installed. The brand is Keystone and the item is new, open box. It is ideal for use in commercial and industrial settings such as facility maintenance and safety, and facility lighting. The LED Emergency Back-Up Driver is an essential item for any business or organization that relies on lighting for safety and security. It ensures that your LED fixtures will continue to operate during power outages, keeping your facility illuminated and safe. This product is compatible with Keystone LED fixtures and comes with easy-to-follow installation instructions. *** This is a replacement driver only ***