IP65 dynamic rated compact format vandal proof stainless steel optical trackball with IP65 dynamic sealed & ruggedized stainless mouse buttons and IP68 dynamic rated washable 38.0mm hardened resin optical trackball module with +800 DPI resolutions for fast and accurate fixing cursor position with extreme smooth operation without any noise, stainless steel trackball optional, with rubber sealing gasket under top stainless steel plate for easy sealing and tightly mounting with cabinet, stainless steel top plate with threaded bolts for top panel mounting solution. High quality durable black titanium electroplated on the top stainless steel plate with threaded bolts for top panel mounting solution. Which is good for outdoor application with direct rain and very harsh environments with humidity, much dynamic water, oil, dirt, salt mist etc, direct drain pipe is optional, no rust risk and anti-salt spray corrosion. DIMENSIONS: 78.0mm x 100.0mm (top panel)