The Asteri MFI also referred to as the Xi-Series. This device has a GOLD label and is "Made for iOS". Compatible with any iOS device version 8 or greater. Meaning you can use the Asteri MFI or Xi-Series to connect to Orbitas Field or any 3rd party iOS based data collection software, allowing for high precision collection. If using Tri-Global’s Orbitas Field, please ensure you have the most updated version. The BLE or X-Series has a BLACK label and is a "Bluetooth Low Energy" device. The X-Series is Tri-Global's original high accuracy GNSS receiver. It is only compatible with an iOS device running UtiliPad or Orbitas for data collection. The BLE may also be paired with a Windows tablet or laptop running OS 10 or greater. Take a look at this .pdf for a visual reference.