The remote display is a multi zone accessory that is placed in an alternative location to the multi-zone monitor, and allows access to the diagnostics, communications and control of the monitoring  unit remotely.  The MZ-DR can connect up to four multi-zone monitors expanding zone coverage to 64 separate test zones.
Leak monitor comes as 4 point standard, which is expandable to 16 points in 4 point increments.

Multi Zone Remote Display

Multi-Zone Gas Leak Monitor