There is a dedicated section in this manual describing this

Store a phone number on each of the three number buttons

Including app for lone workers

position alarm

Umrüstungset Compact 2-Geräten von 2G/GSM auf 4G/LTE Conversion:4G Module There is a dedicated sectionUpgrade kit for Compact 2 devices from 2G GSM to 4G LTE The new Compact2 4G devices have Bluetooth functionality available. Among other things, it can be used to update the software of these devices. What we achieve: Speed of SMS operation the device responds immediately to SMS. Better ringtone quality. Automatic time update from the GSM network. With the new Compact 2 4G device, the time update is done automatically via the GSM network just like with