INSMA 24V 17A 400W LED Switching Power Supply Outdoor Weatherproof Aluminium Shell Housing Input voltage: 220V switch 24V, input Frequency: 50-60HZ. DC ripple, high efficiency, built-in EMI filter, anti-jamming performance Good insulation properties, high dielectric strength to prevent electric shock Soft-start circuit design, AC inrush current limiting, low temperature, long life Overload protection overvoltage protection short circuit 100% load aging,110% to 15% intermittent mode automatic recovery.