diff --git a/Production/Firmware/geki_pico.uf2 b/Production/Firmware/geki_pico.uf2
index 66b8b32..99308a5 100644
Binary files a/Production/Firmware/geki_pico.uf2 and b/Production/Firmware/geki_pico.uf2 differ
diff --git a/firmware/src/airkey.c b/firmware/src/airkey.c
index e826012..2944f67 100644
--- a/firmware/src/airkey.c
+++ b/firmware/src/airkey.c
@@ -38,21 +38,8 @@ static struct {
 
 #define TOF_NUM (count_of(tofs))
 
-static struct {
-    airkey_side_t side;
-    uint16_t in_low;
-    uint16_t in_high;
-    uint16_t out_low;
-    uint16_t out_high;
-} key_defs[] = {
-    { SIDE_LEFT, 50, 200, 20, 230 },
-    { SIDE_RIGHT, 50, 200, 20, 230 },
-    { SIDE_LEFT, 300, 400, 280, 430 },
-    { SIDE_RIGHT, 300, 400, 280, 430 }
-};
-
-#define AIRKEY_NUM (count_of(key_defs))
-
+#define AIRKEY_NUM 3
+static bool airkeys[AIRKEY_NUM];
 static bool sw_val[AIRKEY_NUM]; /* true if triggered */
 static uint64_t sw_freeze_time[AIRKEY_NUM];
 
@@ -100,7 +87,6 @@ void airkey_init()
 
 static uint16_t tof_dist[TOF_NUM];
 static uint16_t tof_mix[2];
-static bool airkeys[AIRKEY_NUM];
 
 static void tof_read()
 {
@@ -186,15 +172,23 @@ static void calc_mix()
     }
 }
 
-#define BETWEEN(x, a, b) (((x) >= (a)) && ((x) <= (b)))
+static inline bool in_bound(uint16_t value, uint16_t low, uint16_t high)
+{
+    return ((value >= low) && (value <= high));
+}
+
 static bool airkey_read(unsigned index)
 {
-    airkey_side_t side = key_defs[index].side;
-    uint16_t dist = tof_mix[side];
+    uint16_t dist = (index == 0) ? tof_mix[SIDE_LEFT] : tof_mix[SIDE_RIGHT];
+    if (dist == 0) {
+        return false;
+    }
+
+    typeof(geki_cfg->tof.trigger[0]) trigger = geki_cfg->tof.trigger[index];
     if (airkeys[index]) { // currently triggered
-        return BETWEEN(dist, key_defs[index].out_low, key_defs[index].out_high);
+        return in_bound(dist, trigger.out_low, trigger.out_high);
     } else {
-        return BETWEEN(dist, key_defs[index].in_low, key_defs[index].in_high);
+        return in_bound(dist, trigger.in_low, trigger.in_high);
     }
 }
 
@@ -235,18 +229,19 @@ void airkey_update()
     }
 }
 
-unsigned airkey_num()
+bool airkey_get_left()
 {
-    return AIRKEY_NUM;
+    return airkeys[0];
 }
 
-bool airkey_get(unsigned id)
+bool airkey_get_right()
 {
-    if (id >= AIRKEY_NUM) {
-        return false;
-    }
+    return airkeys[1];
+}
 
-    return airkeys[id];
+bool airkey_get_shift()
+{
+    return airkeys[2];
 }
 
 unsigned airkey_tof_num()
diff --git a/firmware/src/airkey.h b/firmware/src/airkey.h
index e6069ec..1db6dfc 100644
--- a/firmware/src/airkey.h
+++ b/firmware/src/airkey.h
@@ -12,8 +12,10 @@
 
 void airkey_init();
 void airkey_update();
-unsigned airkey_num();
-bool airkey_get(unsigned id);
+
+bool airkey_get_left();
+bool airkey_get_right();
+bool airkey_get_shift();
 
 unsigned airkey_tof_num();
 const char *airkey_tof_model();
diff --git a/firmware/src/commands.c b/firmware/src/commands.c
index 54abe11..9f462f6 100644
--- a/firmware/src/commands.c
+++ b/firmware/src/commands.c
@@ -51,13 +51,27 @@ static void disp_hid()
     printf("  IO4: %s.\n", geki_cfg->hid.joy ? "ON" : "OFF");
 }
 
-static void disp_tof()
+static void disp_tof_status()
 {
-    printf("[TOF]\n");
     for (int i = 0; i < airkey_tof_num(); i++) {
         printf("  TOF %d: %s", i, airkey_tof_model(i));
     }
     printf("\n");
+}
+
+static void disp_tof_trigger()
+{
+    const char *names[3] = { "WAD Left", "WAD Right", "Shift (Right)" };
+
+    for (int i = 0; i < 3; i++) {
+        typeof(geki_cfg->tof.trigger[0]) trigger = geki_cfg->tof.trigger[i];
+        printf("  %s: in[%d-%d], out[%d-%d]\n", names[i],
+            trigger.in_low, trigger.in_high, trigger.out_low, trigger.out_high);
+    }
+}
+
+static void disp_tof_mix()
+{
     for (int i = 0; i < 2; i++) {
         if (geki_cfg->tof.mix[i].algo > 4) {
             geki_cfg->tof.mix[i].algo = default_cfg.tof.mix[i].algo;
@@ -74,9 +88,22 @@ static void disp_tof()
         }
         printf("\n");
     }
+}
+
+static void disp_tof_roi()
+{
     printf("  ROI: %d (only for VL53L1X)\n", geki_cfg->tof.roi);
 }
 
+static void disp_tof()
+{
+    printf("[TOF]\n");
+    disp_tof_status();
+    disp_tof_mix();
+    disp_tof_trigger();
+    disp_tof_roi();
+}
+
 static void disp_aime()
 {
     printf("[AIME]\n");
@@ -273,7 +300,7 @@ static bool handle_tof_roi(int argc, char *argv[])
     airkey_tof_update_roi();
 
     config_changed();
-    disp_tof();
+    disp_tof_roi();
     return true;
 }
 
@@ -309,7 +336,55 @@ static bool handle_tof_mix(int side, int argc, char *argv[])
     }
     geki_cfg->tof.mix[side].algo = algo;
     config_changed();
-    disp_tof();
+    disp_tof_mix();
+    return true;
+}
+
+static inline bool out_of_bound(int value, int low, int high)
+{
+    return ((value < low) || (value > high));
+}
+
+static bool handle_tof_trigger(int argc, char *argv[])
+{
+    if ((argc < 3) || (argc > 5)) {
+        return false;
+    }
+
+    const char *names[] = { "left", "right", "shift" };
+    int side = cli_match_prefix(names, 3, argv[0]);
+    if (side < 0) {
+        return false;
+    }
+
+    int in_low = cli_extract_non_neg_int(argv[1], 0);
+    int in_high = cli_extract_non_neg_int(argv[2], 0);
+    if ((in_high < in_low) ||
+         out_of_bound(in_low, 1, 999) || out_of_bound(in_high, 1, 999)) {
+        return false;
+    }
+
+    int out_low = in_low;
+    int out_high = in_high;
+    if (argc >= 4) {
+        out_low = cli_extract_non_neg_int(argv[3], 0);
+        if ((out_low > in_low) || out_of_bound(out_low, 1, 999)) {
+            return false;
+        }
+    }
+    if (argc == 5) {
+        out_high = cli_extract_non_neg_int(argv[4], 0);
+        if ((out_high < in_high) || out_of_bound(out_high, 1, 999)) {
+            return false;
+        }
+    }
+
+    geki_cfg->tof.trigger[side].in_low = in_low;
+    geki_cfg->tof.trigger[side].in_high = in_high;
+    geki_cfg->tof.trigger[side].out_low = out_low;
+    geki_cfg->tof.trigger[side].out_high = out_high;
+    config_changed();
+    disp_tof_trigger();
     return true;
 }
 
@@ -338,15 +413,18 @@ static void handle_tof(int argc, char *argv[])
                         "       tof <left|right> <primary|secondary>\n"
                         "       tof <left|right> <max|min> [strict]\n"
                         "       tof <left|right> <avg> [window]\n"
+                        "       tof trigger <left|right|shift> <in_low> <in_high> [<out_low> [out_high]]\n"
                         "       tof diagnose [on|off]\n"
-                        " window: 1..7 (5% ~ 35%)\n";
+                        "   window: 1..7 (5% ~ 35%)\n"
+                        "   in_low, in_high, out_low, out_high: 1..999\n"
+                        "   in_high>=in_low, out_low<=in_low, out_high>=in_high\n";
 
     if (argc < 1) {
         printf(usage);
         return;
     }
 
-    const char *commands[] = { "left", "right", "roi", "diagnose" };
+    const char *commands[] = { "left", "right", "roi", "trigger", "diagnose" };
     int match = cli_match_prefix(commands, count_of(commands), argv[0]);
 
     if (match == 2) {
@@ -354,6 +432,10 @@ static void handle_tof(int argc, char *argv[])
             return;
         }
     } else if (match == 3) {
+        if (handle_tof_trigger(argc - 1, argv + 1)) {
+            return;
+        }
+    } else if (match == 4) {
         if (handle_tof_diag(argc - 1, argv + 1)) {
             return;
         }
diff --git a/firmware/src/config.c b/firmware/src/config.c
index fc80d4d..cc2e406 100644
--- a/firmware/src/config.c
+++ b/firmware/src/config.c
@@ -24,10 +24,14 @@ geki_cfg_t default_cfg = {
     .tof = {
         .roi = 12,
         .mix = {
-            { .strict = 0, .algo = MIX_MAX, .window = 0 },
-            { .strict = 0, .algo = MIX_MAX, .window = 0 },
+            { .strict = 1, .algo = MIX_MAX, .window = 0 },
+            { .strict = 1, .algo = MIX_MAX, .window = 0 },
+        },
+        .trigger = {
+            { 100, 260, 60, 300 },
+            { 100, 260, 60, 300 },
+            { 400, 500, 380, 530 },
         },
-        .reserved = { 0 },
     },
     .sound = {
         .volume = 127,
@@ -43,6 +47,21 @@ geki_runtime_t geki_runtime;
 
 static void config_loaded()
 {
+    for (int i = 0; i < 2; i++) {
+        if (geki_cfg->tof.mix[i].algo > MIX_AVG) {
+            geki_cfg->tof.mix[i].algo = default_cfg.tof.mix[i].algo;
+            config_changed();
+        }
+    }
+
+    for (int i = 0; i < 3; i++) {
+        typeof(geki_cfg->tof.trigger[0]) trigger = geki_cfg->tof.trigger[i];
+        if ((trigger.in_low == 0) || (trigger.in_high == 0) ||
+            (trigger.out_low == 0) || (trigger.out_high == 0)) {
+            geki_cfg->tof.trigger[i] = default_cfg.tof.trigger[i];
+            config_changed();
+        }
+    }
 }
 
 void config_changed()
diff --git a/firmware/src/config.h b/firmware/src/config.h
index 55cf0ea..6560e22 100644
--- a/firmware/src/config.h
+++ b/firmware/src/config.h
@@ -37,7 +37,12 @@ typedef struct __attribute__((packed)) {
             uint8_t algo:4;
             uint8_t window:3;
         } mix[2];
-        uint8_t reserved[5];
+        struct {
+            uint16_t in_low;
+            uint16_t in_high;
+            uint16_t out_low;
+            uint16_t out_high;
+        } trigger[3];
     } tof;
     struct {
         uint8_t joy : 4;
diff --git a/firmware/src/hid.c b/firmware/src/hid.c
index 3b8af03..2f08b23 100644
--- a/firmware/src/hid.c
+++ b/firmware/src/hid.c
@@ -52,7 +52,7 @@ static void gen_hid_buttons()
     hid_joy.buttons[0] = 0;
     hid_joy.buttons[1] = 0;
 
-    if (airkey_get(3)) {
+    if (airkey_get_shift()) {
         if (buttons & 0x40) {
             hid_joy.buttons[key_test.group] |= (1 << key_test.bit);
         }
@@ -70,10 +70,10 @@ static void gen_hid_buttons()
         }
     }
 
-    if (!airkey_get(0)) {
+    if (!airkey_get_left()) {
         hid_joy.buttons[wad_left.group] |= (1 << wad_left.bit);
     }
-    if (!airkey_get(1)) {
+    if (!airkey_get_right()) {
         hid_joy.buttons[wad_right.group] |= (1 << wad_right.bit);
     }
 }
@@ -84,7 +84,7 @@ static void gen_hid_coins()
     uint8_t lever = lever_read();
     static int dec_count = 0;
 
-    if (airkey_get(3)) {
+    if (airkey_get_shift()) {
         if (lever < last_lever) {
             dec_count++;
         } else if (lever > last_lever) {
diff --git a/firmware/src/main.c b/firmware/src/main.c
index 703051d..1071199 100644
--- a/firmware/src/main.c
+++ b/firmware/src/main.c
@@ -50,16 +50,15 @@ static void run_lights()
 
     uint32_t phase = time_us_32() >> 15;
 
-    if (airkey_get(3)) {
+    if (airkey_get_shift()) {
         uint32_t phase = (time_us_32() >> 15) % 3;
         for (int i = 0; i < 3; i++) {
             light_set(1 + i, phase % 3 == i ? 0x808080 : 0);
             light_set(33 + i, phase % 3 == i ? 0x808080 : 0);
         }
     } else {
-        for (int i = 0; i < 2; i++) {
-            light_set_wad(i, airkey_get(i) ? rgb32(0x80, 0, 0xff, false) : 0);
-        }
+        light_set_wad(0, airkey_get_left() ? rgb32(0x80, 0, 0xff, false) : 0);
+        light_set_wad(1, airkey_get_right() ? rgb32(0x80, 0, 0xff, false) : 0);
     }
 
     for (int i = 0; i < 6; i++) {
@@ -70,14 +69,14 @@ static void run_lights()
 
 static void run_sound()
 {
-    if (airkey_get(3)) {
+    if (airkey_get_shift()) {
         sound_set(0, false);
         sound_set(1, false);
         return;
     }
 
-    sound_set(0, airkey_get(0));
-    sound_set(1, airkey_get(1));
+    sound_set(0, airkey_get_left());
+    sound_set(1, airkey_get_right());
 }
 
 const int aime_intf = 1;