Is a Bluetooth laser Rangefinder seen as a keyboard? I could not find the information online. There are many laser Rangefinder that comes with Bluetooth and an application. But I wonder if those device are/could be seen like a regular keyboard. I mean getting a distance will send it to the smartphone as if the user had typed it (what most barcode scanner does).

Is it the most common behavior ? Does only some of them do that? Or not any?

I'm working on a webapp and getting dimensions from real world directly into the app would be nice.

Please answer only if you have seen one working. Thx.
because it has the capability to hold only one devices and it has a good battery talktime(life). Yes,it is a common behavior.