Zalman RESERATOR 1 Water Cooling System Product Type - Fanless Water Cooling System Excellent cooling performance even with natural convection, the world's first fanless, noiseless water-cooling system Product Type - Replacement Lamp Output Voltage Distortion - Less than 5% at full load Output Frequency (sync to mains) - 47 - 53 Hz for 50 Hz nominal,57 - 63 Hz for 60 Hz nominal