... of your hospital and the number of nurse, beds, doctor.How it works?When the patient need service, he can press ... service numbers simultaneously.6, It displays time when no coming call, and 12/24 hour mode switch.7, Easy installation, simple ... -to-one, one-to-more6,Signal Coverage:5000ft (in open area)7,Compatible with one to five key pager wireless patient to nurse emergency call ...