diff --git a/src/helpers/NRF52Board.cpp b/src/helpers/NRF52Board.cpp
index 1885cdf8..34c24c72 100644
--- a/src/helpers/NRF52Board.cpp
+++ b/src/helpers/NRF52Board.cpp
@@ -324,7 +324,9 @@ bool NRF52Board::startOTAUpdate(const char *id, char reply[]) {
   Bluefruit.configPrphConn(92, BLE_GAP_EVENT_LENGTH_MIN, 16, 16);
 
   Bluefruit.begin(1, 0);
-  // Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
+// - nRF52832: -40dBm, -20dBm, -16dBm, -12dBm, -8dBm, -4dBm, 0dBm, +3dBm and +4dBm.
+// - nRF52840: -40dBm, -20dBm, -16dBm, -12dBm, -8dBm, -4dBm, 0dBm, +2dBm, +3dBm, +4dBm,
+//   +5dBm, +6dBm, +7dBm and +8dBm.
   #if defined(NRF52832_XXAA)
   Bluefruit.setTxPower(4);
   #elif defined(NRF52840_XXAA) || defined(NRF52833_XXAA)