diff --git a/README.md b/README.md
index 5f6f8f0..0b1fe8a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
-# IoT Geiger counter with ESP32, OLED display and thingspeak channel
+# IoT Geiger Counter with ESP32, OLED Display and Thingspeak Channel
 
-- Low power mode for battery power supply with OLED display and click sounds, WiFi off
-- WiFi mode for thingspeak data upload every minute using WiFi => https://thingspeak.com/channels/758223
+- Low-power mode for use with batteries, OLED display and click sounds on, WiFi off
+- WiFi mode for thingspeak data upload every minute, see https://thingspeak.com/channels/758223
 [![https://thingspeak.com/channels/758223](media/thingspeak.png)](https://thingspeak.com/channels/758223)
 ![Circuit Board](media/geiger-counter-pcb.jpg)
 
@@ -9,9 +9,9 @@ Feel free to use this project as a base for your own projects AT YOUR OWN RISK!
 
 # Hardware
 
-- Russian Geiger counter tube STS-6 at 400 V with ~5 MOhm
+- Russian Geiger counter tube STS-6 at 400 V with ~5 MΩ series resistor
 - High voltage circuit from ArnoR at mikrocontroller.net https://www.mikrocontroller.net/topic/380666, schematic https://www.mikrocontroller.net/attachment/273334/HystereseStepUpTLC555-2.png. *Keep the high-voltage capacitor small to avoid dangerous charges!*
-- ~400 µs pulse generation using voltage divider, darlington transistor and TLC 555 timer
+- ~400 µs pulse generation using Geiger tube series resistors as voltage divider, high impedance input to darlington transistor and TLC 555 timer for rectangle pulse generation
 - ESP32 board Wemos Lolin32
 - OLED 128x64 with controller SH1106 at I2C
 - Voltage supply from either USB or power supply or 3x 1.5V AAA batteries, circuit works from 3.0 V up to 5.0 V
@@ -24,4 +24,4 @@ Feel free to use this project as a base for your own projects AT YOUR OWN RISK!
 - Eclipse sloeber project using Arduino library, ESP-IDF for sleep functions and u8g2 for display output
 - Low-power mode uses light sleep, a wake-up for each signal pulse change and a wake-up every 1000 ms to update pulse statistics and OLED. This results in about 90% sleep. Could be improved using deep sleep and ULP. However, light sleep is already quite good and much easier.
 - WiFi mode uses no sleep and simple interrupts for pulse counting. Pulse statistics and OLED are updated every 1000 ms, data is sent to thingspeak every 60 s.
-- Credentials (WiFi SSID, password, thingspeak channel key) are only declared in {credentials.h} and must be defined in a {credentials.cpp}
+- Credentials (WiFi SSID, password, thingspeak channel key) are only declared in `credentials.h` and must be defined in a `credentials.cpp`