diff --git a/README.md b/README.md
index 8f13080..3c8e754 100644
--- a/README.md
+++ b/README.md
@@ -16,13 +16,13 @@ are needed for this to work.
 
 **Connecting together:**
 
-I2S device | ESP32   | Usage
----------- | ------- | -----------
-VIN/VCC    | 3V3/5V  | Power (3V)
-GND        | GND     | Power (GND)
-WS/LRCLK   | GPIO15  | Word select
-DIN/Data   | GPIO22  | actual i2s data
-BCLK       | GPIO15  | Serial clock
+I2S device | ESP32                             | Usage
+---------- | --------------------------------- | -----------
+VIN/VCC    | 3V3/5V (refer to the DACs specs)  | Power (3V)
+GND        | GND                               | Power (GND)
+WS/LRCLK   | GPIO15                            | Word select
+DIN/Data   | GPIO22                            | actual i2s data
+BCLK       | GPIO15                            | Serial clock
 
 
 ## Flashing