1. Power range: 30W/50W/75W/100W/150W/200W/240W. 2. Rated Input voltage:200-277V. Output voltage:20-38Vdc/32-58Vdc, Constant power range: 32-38/Vdc/42-58Vdc 3. Add 500-1050mA high voltage and low current type. 4. Efficiency up to 91%/High PF≥0.9/THD≤10%@230VAC Low THD interference 5.3C ENEC TUV CE CB SAA certification 6. Surge protection:30-75W, 4/6KV;100W and above,6/15KV 7.SCP/OTP/OVP/OCP protection. 8.Life time＞50,000hrs, And 5 years warranty.