KFD products are UL / CE / FCC / RoHS certified, UL LISTED: Tested, Approved and Certified by UL. UL number is unique. UL testing is authorized by OSHA - US Federal Agency ; tested by the manufacturer to match and / or exceed the OEM specifications Warranty: 30 Days Free Exchange /36 Months Warranty; This adapters was made with the highest quality materials.V-0 grade flame retardant,OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection)100% compatibility with the original,more safety than other adapter Input: 100-240V 50-60Hz Output:18V 2.69A 48.42W (2.5A/ 2A/ 1.5A/ 1A/ 0.5A Compatible) Connector size:Barrel DC Plug 5.5x2.1mm With 6 Tips 6.5x4.4mm/ 6.5x3.0mm/ 5.5x2.5mm/ 4.8x1.7mm/ 4.0x1.7mm/ 5.5x3.0mm ; -Please confirm the specifications and plug size before purchasing!If you can't make sure,pls feel free to contact us Compatible With PetSafe ScoopFree Ultra Self-Cleaning Cat Litter Box RFA-51