69 keys compact format IP65 dynamic vandal proof stainless steel industrial keyboard with 38.0mm trackball model, industrial PCB with carbon-on-gold key switch technology with long stroke (2.0mm) with extremely good tactile feeling for fast and accurate data input without any noise, one complete silicone rubber along mounting aluminium plate for easy mounting & sealing tightly with cabinet, 3 mouse buttons designed for right & left clicking and scrolling up and down with ball rolling. High quality durable black titanium electroplated on the top stainless steel plate and all keys, rear panel mounting solution.4 optional trackball modules: IP65 static mechanical trackball module with 400 DPI, IP65 static chameleon trackball module with 400 DPI, IP68 dynamic optical trackball module with 800 DPI,IP68 dynamic laser trackball module with 1200 DPI