About 4G Dual SIM Elevator Solution with battery backup

4G ELEVATOR SOLUTIONS
4G LTE Elevator voice gateway with failover protection
Auto network failure detection with second SIM (4G)
Battery backup  for up to 8+ Hours. Battery & power status monitoring to 3 numbers by SMS. Includes wall mounting bracket, Antenna with 3M cable
Intercom line supports 48v DC & 90v AC ring (OK for wired distance up to 5KMs) Primary + Failover SIM supports all carriers.