The MSF Lighting MUD-400W-12V-R3 is a professional-grade 400W LED power supply designed for large-scale LED strip and signage installations. It delivers a stable 12V DC output at up to 33.3A from a 170-265V AC input. The robust enclosure provides rainproof protection along with short circuit, over-current, and over-voltage protection for safe, reliable operation. Optimum operating temperature: -30°C to +50°C. Humidity range: 20%-90% RH. Certified CE and RoHS. Suitable for commercial signage, LED channel letter lighting, and large LED display installations.