ULTRA SILENT due to Optimized Control Electronics. Current pump suitable for use in salt or freshwater aquaria. Includes controller for adjusting the 9 different wave modes and water output. 0–10V-connection for external control. Feeding mode. Magnetic holder with vibration reducing dampers for glass thickness up to 15mm. Optional Master Controller for remote control of multiple EcoDrift pumps. Power-saving D/C motor 24 Volt. Polished ceramic shaft and bearings for quiet operation and low maintenance. Light sensor for automatic reduction of water flow at night. EcoDrift 20.2: Output 5 step adjustable 4,000 to 20,000 L/H. Consumption 20-60w. L136 x W110. Outlet Diameter 75mm. 2 year warranty.