Typically measuring slide Serial Numbers > 510410 = 64 bit >106174 = 64 bit
A 64 bit Bluetooth will sometimes have a sticker on it similar to the one above
**32 Bit dongles are digitally paired with the measuring slide and
cannot be replaced seperately
If you have a 32 Bit Bluetooth Measuring Slide you will need the Ezurio driver software. If it is already installed you will have a big bluetooth Icon on your Desktop or you can check your programs and features. If you need it, you can download the attached file.
Below is an example of a bluetooth dongle.
This is what provides communication between the measuring slide
and the computer. It will say Liard, TDK or Ezuiro