diff --git a/print_server.py b/print_server.py
index 7533fd8..4e15771 100644
--- a/print_server.py
+++ b/print_server.py
@@ -12,7 +12,13 @@ from jobs.maze import MazeJob
 # Example: 0x04b8 is Epson.
 USB_VENDOR_ID = 0x0525  
 USB_PRODUCT_ID = 0xa700
+# Input interface:
+# `lsusb -vvv -d xxxx:xxxx | grep iInterface`
+#    iInterface              0
 INPUT_ENDPOINT = 0x00
+# Output interface:
+# `lsusb -vvv -d xxxx:xxxx | grep bEndpointAddress | grep OUT`
+#      bEndpointAddress     0x01  EP 1 OUT
 OUTPUT_ENDPOINT = 0x01
 
 # Set to True to print to console instead of physical printer (for testing)
@@ -28,12 +34,12 @@ def get_printer():
     
     try:
         # Initialize USB printer
-        # profile="TM-T88V" is a generic profile, works for many ESC/POS printers
-        
+        # Generic printer with custom settings:
         p = Usb(USB_VENDOR_ID, USB_PRODUCT_ID, 0, INPUT_ENDPOINT, OUTPUT_ENDPOINT, profile="default")
         p.profile.profile_data['media']['width']['mm'] = 80
         p.profile.profile_data['media']['width']['pixels'] = 512
 
+        # Specific printer based on a profile. See https://python-escpos.readthedocs.io/en/latest/printer_profiles/available-profiles.html
         # p = Usb(USB_VENDOR_ID, USB_PRODUCT_ID, 0, INPUT_ENDPOINT, OUTPUT_ENDPOINT, profile="TM-T88V")
         return p
     except USBNotFoundError: