SMPS LED Switching Power Supply Driver Constant Voltage 120w 24v 5a, 110v 220v Ac Dc Transformer Adapter Converter Automatic Protections: short circuit, over load, over voltage and over temperature. CE, RoHS certification. Conform to EN60950 GB4943 UL60950 Safety Standards and GB9254 EN55022 EMC Standards. Easy to install. Cut the AC input before installing or checking any unnormal phenomenons. Make sure the INPUT&OUTPUT were in right situation before connected to power supply. Professinal technical service for you in pre-sale, sale and after-sale. Under 2kg, deliveried by USPS(7-20 days). Over 2kg, deliveried by DHL(2-5 days).