Update README

README.rst

@@ -14,18 +14,20 @@ You will need:
  * A `Respberry Pi Zero <https://www.raspberrypi.org/products/raspberry-pi-zero/>`_ or a `Raspberry Pi Zero W <https://www.raspberrypi.org/products/raspberry-pi-zero-w/>`_
   * Raspberry Pi 2/3 **DOES NOT** work because they cannot work in USB gadget mode.
  * An `Adafruit 128x64 OLED Bonnet for Raspberry Pi <https://www.adafruit.com/product/3531>`_ (optional)
-  * You can go without the OLED and the buttons, and let this hardware wallet create and sign the transactions without confirmation.
+  * The hardware wallet will approve transactions automatically if the OLED and the buttons are not available.
  * A `2x20-pin Strip Dual Male Header <https://www.adafruit.com/product/2822>`_ (optional)
   * You might also need this if your Raspberry Pi Zero doesn't come with the 2x20 pins, and you will have to solder this manually.
 
 Installation
-========================
+============
 
 The following steps should be done on the Raspberry Pi Zero.
 Note: The Praline can work offline, but you will need internet access during the installation.
 
 Run as an USB serial gadget
---------------------------
+---------------------------
+
+The Praline talks to the host through USB serial interface
 
 .. code-block:: sh