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. 010V-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 8.2: Output 5 step adjustable 1,600 to 8,000 L/H. Consumption 8-20w. L96 x W84. Outlet Diameter 40mm. 2 year warranty.