High efficiency / Simple construction / Electromagnetic linear motor. 85 Watt 150L/Min YUTING (SUNSUN BRAND) / 4.8KG. CAN BE USED FOR LONG WORKING HOURS. HEAVY DUTY. Suitable for high-density aquaculture, for adding oxygen to large Seafood aquaculture and first class aquariums Specification: Power: 185w voltage: 220-240v, 50 Hz Output: 150 litres/minute Dimensions: 11.75" x 7" x 6.25" Weight: 4630 Grams