The Security Door 474U is a sanitary touchless exit switch with an infrared sensor, 5" read range, a wave to exit LED and an illuminated status indication. The unit allows the user to control electric locks/strikes, magnetic locks, or automatic door operators. The switch is ideal for Entry/exit for sanitary environments including: bathrooms, cleanrooms, hospitals, labs, schools, or offices. Also known as -Sdc - Security Door Controls TOUCHLSS SWIT 12/ 24VDC 4 RANGE - SZ-474U