diff --git a/variants/heltec_wireless_tracker/variant.h b/variants/heltec_wireless_tracker/variant.h
index 0f632a33c..d496a8d6f 100644
--- a/variants/heltec_wireless_tracker/variant.h
+++ b/variants/heltec_wireless_tracker/variant.h
@@ -27,7 +27,11 @@
 #define SCREEN_TRANSITION_FRAMERATE 3 // fps
 #define DISPLAY_FORCE_SMALL_FONTS
 
-#define VEXT_ENABLE_V05 3 // active HIGH, powers the lora antenna boost
+  // pin 3 is Vext on v1.1 - HIGH enables LDO for Vext rail which goes to:
+  // GPS UC6580:          GPS V_DET(8), VDD_IO(7), DCDC_IN(21), pulls up RESETN(17), D_SEL(33) and BOOT_MODE(34) through 10kR 
+  // GPS LNA SW7125DE:    VCC(4), pulls up SHDN(5) through 10kR
+  // LED:                 VDD, LEDA (through diode) 
+#define VEXT_ENABLE_V05 3 // active HIGH - powers the GPS, GPS LNA and OLED VDD/anode
 #define BUTTON_PIN 0
 
 #define BATTERY_PIN 1 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
@@ -43,6 +47,7 @@
 #define GPS_TX_PIN 34
 #define PIN_GPS_RESET 35
 #define PIN_GPS_PPS 36
+// #define PIN_GPS_EN 3    // Uncomment to power off the GPS with triple-click on Tracker v1.1, though we'll also lose the display.
 
 #define GPS_RESET_MODE LOW
 #define GPS_UC6580