UL Listing means that Underwriters Laboratories (UL) has tested representative samples of the product and determined that it meets UL's requirements. UL is a global independent safety science company that conducts independent testing, validation, certification and verification of products and is a Nationally Recognized Testing Laboratory (NRTL). ULs requirements are based primarily on its published and nationally recognized Standards for Safety. The ByoPlanet Electrostatic Spray System has been tested under UL 73 (USA) and CSA 22.2 No. 68 (CAN) which are standards for motor operated machinery and cover the overall safety in terms of fire, electrical shock and overall safety to people and property.