The Wall Unit is a display where the system is monitored by pool staff or lifeguard. The Wall Unit interacts with the Sentag System and will in case of incident, display the type of alarm and where the incident is located. The alarm can be highlighted by siren, voice message or flash lamp etc. The display is preferably placed close to the pool, on the wall. Staff is using personal pin-code to acknowledge the system, to mute and reset the alarm after acting to the incident.