Hi Julie, we use Blackline safety devices G7x and G7c for our various sites.
We have 20 devices in total and we have these at our main processing site as well as spread across nine remote areas of the Marlborough sounds, Golden Bay and Canterbury. We have Wi-Fi at these sites using star link (if required) so we only need three bridges for areas that have patchy Wi-Fi available. We currently only run two devices max per bridge. These are monitored remotely by Direct Safety who contact the device /wearer directly if the device has no movement after the specified time. If they need to be serviced or firmware updated the units / bridges have to be sent to their base in Auckland.
We are happy with the units and the service we receive and Direct Safety are easy to contact for anything we need.