diff --git a/NANOVNA_STM32_F303/board.h b/NANOVNA_STM32_F303/board.h
index cd44971..de76c85 100644
--- a/NANOVNA_STM32_F303/board.h
+++ b/NANOVNA_STM32_F303/board.h
@@ -25,7 +25,7 @@
  * Board identifier.
  */
 #define BOARD_NANOVNA_STM32_F303
-#define BOARD_NAME              "tinySA4"
+#define BOARD_NAME              "tinySA ULTRA"
 
 #include <stm32f303xc.h>
 //#include "..\nanovna.h"
diff --git a/main.c b/main.c
index ed571c2..aa776e6 100644
--- a/main.c
+++ b/main.c
@@ -1845,12 +1845,36 @@ VNA_SHELL_FUNCTION(cmd_test)
 
 const char TINYSA_VERSION[] = VERSION;
 
+#ifdef TINYSA4
+typedef struct version_t {
+  const uint16_t min_adc;
+  const uint16_t max_adc;
+  const char *text;
+} version_t;
+
+#define MAX_VERSION_TEXT    1
+const version_t hw_version_text[MAX_VERSION_TEXT] =
+{
+ { 160, 169,    "V0.4.5.1"}
+};
+
+const char *get_hw_version_text(void)
+{
+  int v = adc1_single_read(0);
+  for (int i=0; i<MAX_VERSION_TEXT;i++) {
+    if (hw_version_text[i].min_adc <= v && v <= hw_version_text[i].max_adc)
+      return hw_version_text[i].text;
+  }
+  return "Unknown";
+}
+#endif
+
 VNA_SHELL_FUNCTION(cmd_version)
 {
   (void)argc;
   (void)argv;
 #ifdef TINYSA4
-  shell_printf("%s\r\nHW Version:%d\r\n", TINYSA_VERSION, adc1_single_read(0));
+  shell_printf("%s\r\nHW Version:%s\r\n", TINYSA_VERSION, get_hw_version_text());
 #else
   shell_printf("%s\r\n", TINYSA_VERSION);
 #endif
diff --git a/sa_core.c b/sa_core.c
index 7ce893a..c0b2610 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -7376,7 +7376,6 @@ float get_jump_config(int i) {
 }
 
 enum {CS_NORMAL, CS_LNA, CS_SWITCH, CS_ULTRA, CS_ULTRA_LNA, CS_DIRECT_REF, CS_DIRECT, CS_DIRECT_LNA, CS_MAX };
-#define DRIRECT_CAL_FREQ    990000000   // 960MHz
 #define ULTRA_HARMONIC_CAL_FREQ 5340000000
 #else
 enum {CS_NORMAL, CS_SWITCH, CS_MAX };
@@ -7565,18 +7564,18 @@ void calibrate(void)
           force_signal_path = true;
           break;
         case CS_DIRECT_REF:
-          set_sweep_frequency(ST_CENTER, DRIRECT_CAL_FREQ);
+          set_sweep_frequency(ST_CENTER, direct_test_freq);
           test_path = 2;      // Ultra
           force_signal_path = true;
           break;
         case CS_DIRECT:
-          set_sweep_frequency(ST_CENTER, DRIRECT_CAL_FREQ);
+          set_sweep_frequency(ST_CENTER, direct_test_freq);
           test_path = 4;      // Direct path at 900MHz
           force_signal_path = true;
           config.direct_level_offset -= 1.0;
           break;
         case CS_DIRECT_LNA:
-          set_sweep_frequency(ST_CENTER, DRIRECT_CAL_FREQ);
+          set_sweep_frequency(ST_CENTER, direct_test_freq);
           test_path = 5;      // Direct lna path at 900MHz
           force_signal_path = true;
           config.direct_lna_level_offset += 1.0;
diff --git a/ui.c b/ui.c
index 42def71..22c41f6 100644
--- a/ui.c
+++ b/ui.c
@@ -480,6 +480,9 @@ touch_position(int *x, int *y)
   *x = tx;
   *y = ty;
 }
+#ifdef TINYSA4
+extern const char *get_hw_version_text(void);
+#endif
 
 void
 show_version(void)
@@ -513,7 +516,7 @@ show_version(void)
     ili9341_drawstring_7x13(info_about[i++], x, y+=bFONT_STR_HEIGHT+2-5);
   }
   char buf[96];
-  plot_printf(buf, sizeof(buf), "HW Version:%d", adc1_single_read(0));
+  plot_printf(buf, sizeof(buf), "HW Version:%s", get_hw_version_text());
   ili9341_drawstring_7x13(buf, x, y+=bFONT_STR_HEIGHT);
 
 extern const char *states[];