16 keys compact format IP65 dynamic vandal proof Stainless Steel industrial numeric keypad with industrial metal dome PCB electronics controller shielded & protected by stainless steel housing, industrial metal dome PCB with gold-on-gold key switch technology with short stroke 0.45mm with excellent tactile feeling for stable and accurate data input, top stainless steel plate with sealing gasket for easy & tight sealing and mounting to enclosure or panel, with threaded bolts under top stainless steel plate for top panel mounting solution. with backlight included