1.Switchable magnetic for MH and HPS lamp 2.Short circuit protection 3. High output performance and low noise 4.CE&UL Features: 1. 400W,600W,1000W available2.Convert with a switch from HPS to MH3.Dual voltage features ,easily switch from 120V to 240V4.Heavy duty handle for easily carrying4.Rubber feet reduce noise and vibration5.High quality ballast will insure 5 years warranty.