What are the icons for bluetooth devices shown in bluetooth scan menu?

In android bluetooth scan menu, the scanned devices are given various icons which specify the type of device that they are reporting themselves to be What are device types 1 and 2 shown in this picture, and where can I get a list of all possible device types and their icons? Is this icon list specific to a smartphone or is it from the default android? This screenshot is from Samsung galaxy s7 with android 8.0.0 Edit: or is there any way to probe for this information through adb or something? Edit2: for anyone interested I downloaded an app called Bluetooth scanner and it shows device 1 as "Unknown". So may be that's just what this icon means.