The site may be miles long. Radios work well over these distances. Bluetooth communications are limited to about half a mile, but Mesh Bluetooth technology enables each headset to act as a node, relaying the signal to the next headset, extending the range. Mesh network adapters can act as repeaters, extending the range farther, and connect to mobile phones beyond the worksite. If a driver leaves the coverage area, the headset will automatically reconnect when the driver reenters.