Features:

400W ELECTRONIC SWITCHABLE BALLAST

• Built-in cooling fans
•  Built-in standard reflector interface
•  Fit for High Pressure Sodium Lamps or Metal Halide Lamps
•  CE Certificate
•  Reset-able circuit breaker for short circuit protection 
• Low Noise
•  Completely silent and lightweight.
•  Extreme 99.9% power efficiency.
•  Specified Frequency: 50/60Hz
•  Working Voltage Range: 120V/240V
•  With a 6ft. power cord to wall (US standard plug)
•  switch between 400, 250 and 150 watt
•  Auto Detect MH/HPS capable.