diff --git a/README.md b/README.md
index 7fbf2f2..52161ba 100644
--- a/README.md
+++ b/README.md
@@ -172,16 +172,18 @@ There are multiple backends for connecting to the printer available (✔: suppor
 
 Backend | Kind | Linux | Mac OS | Windows
 -------|-------|---------|---------|--------
-network | TCP | ✔ | ✔ | ✔
-linux\_kernel | USB | ✔ (1) | ✘ | ✘
-pyusb (2) | USB | ✔ (2a) | ✔ (2b) | ✔ (2c)
+network (1) | TCP | ✔ | ✔ | ✔
+linux\_kernel | USB | ✔ (2) | ✘ | ✘
+pyusb (3) | USB | ✔ (3a) | ✔ (3b) | ✔ (3c)
 
 Notes:
 
-1. The label printer should show up automatically as `/dev/usb/lp0` when connected.
+1. The network backend doesn't support reading back the printer state, currently.
+   Failure such as *wrong label type* or *end of label roll reached* won't be detected by this software.
+2. The label printer should show up automatically as `/dev/usb/lp0` when connected.
    Please check the ownership (user, group) of this file to be able to print as a regular user.
    Consider setting up a udev .rules file.
-2. PyUSB is a Python wrapper allowing to implement USB communication in userspace.
+3. PyUSB is a Python wrapper allowing to implement USB communication in userspace.
    a. On Linux: install libusb1 as offered by your distribution: `sudo apt-get install libusb-1.0-0` (Ubuntu, Debian), `sudo zyppe in libusb-1_0-0` (OpenSUSE), `sudo pacman -S libusb` (Arch).
    b. On Mac OS: Install [Homebrew](https://brew.sh/) and then install libusb1 using: `brew install libusb`.
    c. On Windows: download [libusb-win32-devel-filter-1.2.6.0.exe](https://sourceforge.net/projects/libusb-win32/files/libusb-win32-releases/1.2.6.0/)