These 7-in-1 antennas contain seven antenna elements. Typically this means one GPS or GNSS antenna element and six additional element. With seven elements, it is possible to offer 4xMIMO (Multiple-Input-Multiple-Output) coverage, i.e. 2xLTE, 4xLTE and 1xGNSS. Or, it is possible to offer dual-carrier MIMO LTE coverage along with 2xMIMO coverage on WiFi, e.g. 4xLTE, 2xWiFi and 1xGPS.
There are many different combinations possible. The specific combinations are called out at the product level.