diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -6,6 +6,18 @@ It measures the current CO<sub>2</sub> concentration (in ppm), and displays it o
 
 The room should be ventilated as soon as one LED turns red.
 
+## Features
+
+The *CO<sub>2</sub> Ampel* can:
+
+* Display CO2 concentration on LED ring.
+* Allow calibration.
+* Get current time over NTP
+* Send data over MQTT.
+* Send data over LoRaWAN.
+* Display measurements and configuration on a small website.
+* Log data to a CSV file, directly on the ESP flash memory.
+
 ## Hardware Requirements
 
 * [ESP8266](https://en.wikipedia.org/wiki/ESP8266) or [ESP32](https://en.wikipedia.org/wiki/ESP32) microcontroller (this project has been tested with *ESP8266 ESP-12 WIFI* and *TTGO ESP32 SX1276 LoRa*)