The Cool-ER firmware update process uses an executable called 'check' to get the device type.
If you really want to know what type it is you can do the following:
In the Cool-ER firmware look in bin/sd_upgrade_fs_all.sh for
echo $dev_name > /device.txt
after that and flash the firmware again it will put the device.txt file on the sd card you're using and you can read it from there.
Though you could break it accidentally, so if you do, be careful.