This product is with the waterworks which can wash the window of the ship, or boat.It is suitable for ship cab and operating rooms with the use of wiping water on the windows of wheel house. With variable speed motors for power supply,guiding with alloy shells, driving the rubber blade in the bottom of blow rod, it can scrape parallel on the windows of wheel house, thus the window can be kept clear when rainwater and snow sprinkle on it.It can also wash off the dust on the window. The product can also be with the heater if you need it.If you are interested in this product, you can contact us, we will provide the professional suggestion about the installation.