We currently support Bluetooth Smart (V4.0) and Bluetooth 2.1.
Most new devices use Bluetooth Smart, and some are "dual mode".
These PDFs have additional compatibility information:
Some of these PDFs refer to the European model designations for DISTOs. Here is the decoder ring for corrosponding US models:
|European Model||US Model|
Generally speaking, if you are looking to pair a DISTO with an older Android or Windows device running Bluetooth 2.1 (which is a common scenario for AutoCAD users), the D330i is the safest choice.