diff --git a/common/keycode.h b/common/keycode.h
index 4ed78a46..f9331cdb 100644
--- a/common/keycode.h
+++ b/common/keycode.h
@@ -29,10 +29,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define IS_MOD(code)             (KC_LCTRL     <= (code) && (code) <= KC_RGUI)
 
 #define IS_FN(code)              (KC_FN0       <= (code) && (code) <= KC_FN7)
-#define IS_MOUSEKEY(code)        (KC_MS_UP     <= (code) && (code) <= KC_MS_WH_RIGHT)
+#define IS_MOUSEKEY(code)        (KC_MS_UP     <= (code) && (code) <= KC_MS_ACCEL2)
 #define IS_MOUSEKEY_MOVE(code)   (KC_MS_UP     <= (code) && (code) <= KC_MS_RIGHT)
 #define IS_MOUSEKEY_BUTTON(code) (KC_MS_BTN1   <= (code) && (code) <= KC_MS_BTN5)
 #define IS_MOUSEKEY_WHEEL(code)  (KC_MS_WH_UP  <= (code) && (code) <= KC_MS_WH_RIGHT)
+#define IS_MOUSEKEY_ACCEL(code)  (KC_MS_ACCEL0 <= (code) && (code) <= KC_MS_ACCEL2)
 
 #define IS_SPECIAL(code)         ((0xB0 <= (code) && (code) <= 0xDF) || (0xE8 <= (code) && (code) <= 0xFF))
 #define IS_CONSUMER(code)        (KC_MUTE      <= (code) && (code) <= KC_WFAV)
@@ -120,6 +121,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define KC_WH_D KC_MS_WH_DOWN
 #define KC_WH_L KC_MS_WH_LEFT
 #define KC_WH_R KC_MS_WH_RIGHT
+#define KC_ACL0 KC_MS_ACCEL0
+#define KC_ACL1 KC_MS_ACCEL1
+#define KC_ACL2 KC_MS_ACCEL2
 /* Sytem Control */
 #define KC_PWR  KC_SYSTEM_POWER
 #define KC_SLEP KC_SYSTEM_SLEEP
@@ -429,13 +433,16 @@ enum internal_special_keycodes {
     KC_MS_BTN2,
     KC_MS_BTN3,
     KC_MS_BTN4,
-    KC_MS_BTN5,
+    KC_MS_BTN5,         /* 0xF8 */
     /* Mousekey wheel */
     KC_MS_WH_UP,
     KC_MS_WH_DOWN,
     KC_MS_WH_LEFT,
     KC_MS_WH_RIGHT,     /* 0xFC */
-                        /* 0xFD-FF vacant for future use */
+    /* Mousekey accel */
+    KC_MS_ACCEL0,
+    KC_MS_ACCEL1,
+    KC_MS_ACCEL2        /* 0xFF */
 };
 
 #endif /* KEYCODE_H */
diff --git a/common/mousekey.c b/common/mousekey.c
index 99e6d34f..b8af3e59 100644
--- a/common/mousekey.c
+++ b/common/mousekey.c
@@ -27,40 +27,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
 static uint8_t mousekey_repeat =  0;
+static uint8_t mousekey_accel = 0;
 
 static void mousekey_debug(void);
 
 
-/* max value on report descriptor */
-#define MOUSEKEY_MOVE_MAX       127
-#define MOUSEKEY_WHEEL_MAX      15
-
-#ifndef MOUSEKEY_MOVE_DELTA
-#define MOUSEKEY_MOVE_DELTA     5
-#endif
-#ifndef MOUSEKEY_WHEEL_DELTA
-#define MOUSEKEY_WHEEL_DELTA    1
-#endif
-#ifndef MOUSEKEY_DELAY
-#define MOUSEKEY_DELAY 300
-#endif
-#ifndef MOUSEKEY_INTERVAL
-#define MOUSEKEY_INTERVAL 50
-#endif
-#ifndef MOUSEKEY_MAX_SPEED
-#define MOUSEKEY_MAX_SPEED 10
-#endif
-#ifndef MOUSEKEY_TIME_TO_MAX
-#define MOUSEKEY_TIME_TO_MAX 20
-#endif
-#ifndef MOUSEKEY_WHEEL_MAX_SPEED
-#define MOUSEKEY_WHEEL_MAX_SPEED 8
-#endif
-#ifndef MOUSEKEY_WHEEL_TIME_TO_MAX
-#define MOUSEKEY_WHEEL_TIME_TO_MAX 40
-#endif
-
-
 /*
  * Mouse keys  acceleration algorithm
  *  http://en.wikipedia.org/wiki/Mouse_keys
@@ -68,18 +39,18 @@ static void mousekey_debug(void);
  *  speed = delta * max_speed * (repeat / time_to_max)**((1000+curve)/1000)
  */
 /* milliseconds between the initial key press and first repeated motion event (0-2550) */
-static uint8_t mk_delay = MOUSEKEY_DELAY/10;
+uint8_t mk_delay = MOUSEKEY_DELAY/10;
 /* milliseconds between repeated motion events (0-255) */
-static uint8_t mk_interval = MOUSEKEY_INTERVAL;
+uint8_t mk_interval = MOUSEKEY_INTERVAL;
 /* steady speed (in action_delta units) applied each event (0-255) */
-static uint8_t mk_max_speed = MOUSEKEY_MAX_SPEED;
+uint8_t mk_max_speed = MOUSEKEY_MAX_SPEED;
 /* number of events (count) accelerating to steady speed (0-255) */
-static uint8_t mk_time_to_max = MOUSEKEY_TIME_TO_MAX;
+uint8_t mk_time_to_max = MOUSEKEY_TIME_TO_MAX;
 /* ramp used to reach maximum pointer speed (NOT SUPPORTED) */
-//static int8_t mk_curve = 0;
-
-static uint8_t mk_wheel_max_speed = MOUSEKEY_WHEEL_MAX_SPEED;
-static uint8_t mk_wheel_time_to_max = MOUSEKEY_WHEEL_TIME_TO_MAX;
+//int8_t mk_curve = 0;
+/* wheel params */
+uint8_t mk_wheel_max_speed = MOUSEKEY_WHEEL_MAX_SPEED;
+uint8_t mk_wheel_time_to_max = MOUSEKEY_WHEEL_TIME_TO_MAX;
 
 
 static uint16_t last_timer = 0;
@@ -88,25 +59,39 @@ static uint16_t last_timer = 0;
 static uint8_t move_unit(void)
 {
     uint16_t unit;
-    if (mousekey_repeat > mk_time_to_max) {
+    if (mousekey_accel & (1<<0)) {
+        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed)/4;
+    } else if (mousekey_accel & (1<<1)) {
+        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed)/2;
+    } else if (mousekey_accel & (1<<2)) {
+        unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed);
+    } else if (mousekey_repeat == 0) {
+        unit = MOUSEKEY_MOVE_DELTA;
+    } else if (mousekey_repeat >= mk_time_to_max) {
         unit = MOUSEKEY_MOVE_DELTA * mk_max_speed;
     } else {
         unit = (MOUSEKEY_MOVE_DELTA * mk_max_speed * mousekey_repeat) / mk_time_to_max;
     }
-    if (unit == 0) return 1;
-    return (unit > MOUSEKEY_MOVE_MAX ? MOUSEKEY_MOVE_MAX : unit);
+    return (unit > MOUSEKEY_MOVE_MAX ? MOUSEKEY_MOVE_MAX : (unit == 0 ? 1 : unit));
 }
 
 static uint8_t wheel_unit(void)
 {
     uint16_t unit;
-    if (mousekey_repeat > mk_time_to_max) {
+    if (mousekey_accel & (1<<0)) {
+        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed)/4;
+    } else if (mousekey_accel & (1<<1)) {
+        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed)/2;
+    } else if (mousekey_accel & (1<<2)) {
+        unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed);
+    } else if (mousekey_repeat == 0) {
+        unit = MOUSEKEY_WHEEL_DELTA;
+    } else if (mousekey_repeat >= mk_time_to_max) {
         unit = MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed;
     } else {
         unit = (MOUSEKEY_WHEEL_DELTA * mk_wheel_max_speed * mousekey_repeat) / mk_wheel_time_to_max;
     }
-    if (unit == 0) return 1;
-    return (unit > MOUSEKEY_WHEEL_MAX ? MOUSEKEY_WHEEL_MAX : unit);
+    return (unit > MOUSEKEY_WHEEL_MAX ? MOUSEKEY_WHEEL_MAX : (unit == 0 ? 1 : unit));
 }
 
 void mousekey_task(void)
@@ -126,6 +111,7 @@ void mousekey_task(void)
     if (mouse_report.y > 0) mouse_report.y = move_unit();
     if (mouse_report.y < 0) mouse_report.y = move_unit() * -1;
 
+    /* diagonal move [1/sqrt(2) = 0.7] */
     if (mouse_report.x && mouse_report.y) {
         mouse_report.x *= 0.7;
         mouse_report.y *= 0.7;
@@ -141,19 +127,22 @@ void mousekey_task(void)
 
 void mousekey_on(uint8_t code)
 {
-    if      (code == KC_MS_UP)       mouse_report.y = MOUSEKEY_MOVE_DELTA * -1;
-    else if (code == KC_MS_DOWN)     mouse_report.y = MOUSEKEY_MOVE_DELTA;
-    else if (code == KC_MS_LEFT)     mouse_report.x = MOUSEKEY_MOVE_DELTA * -1;
-    else if (code == KC_MS_RIGHT)    mouse_report.x = MOUSEKEY_MOVE_DELTA;
-    else if (code == KC_MS_WH_UP)    mouse_report.v = MOUSEKEY_WHEEL_DELTA;
-    else if (code == KC_MS_WH_DOWN)  mouse_report.v = MOUSEKEY_WHEEL_DELTA * -1;
-    else if (code == KC_MS_WH_LEFT)  mouse_report.h = MOUSEKEY_WHEEL_DELTA * -1;
-    else if (code == KC_MS_WH_RIGHT) mouse_report.h = MOUSEKEY_WHEEL_DELTA;
+    if      (code == KC_MS_UP)       mouse_report.y = move_unit() * -1;
+    else if (code == KC_MS_DOWN)     mouse_report.y = move_unit();
+    else if (code == KC_MS_LEFT)     mouse_report.x = move_unit() * -1;
+    else if (code == KC_MS_RIGHT)    mouse_report.x = move_unit();
+    else if (code == KC_MS_WH_UP)    mouse_report.v = wheel_unit();
+    else if (code == KC_MS_WH_DOWN)  mouse_report.v = wheel_unit() * -1;
+    else if (code == KC_MS_WH_LEFT)  mouse_report.h = wheel_unit() * -1;
+    else if (code == KC_MS_WH_RIGHT) mouse_report.h = wheel_unit();
     else if (code == KC_MS_BTN1)     mouse_report.buttons |= MOUSE_BTN1;
     else if (code == KC_MS_BTN2)     mouse_report.buttons |= MOUSE_BTN2;
     else if (code == KC_MS_BTN3)     mouse_report.buttons |= MOUSE_BTN3;
     else if (code == KC_MS_BTN4)     mouse_report.buttons |= MOUSE_BTN4;
     else if (code == KC_MS_BTN5)     mouse_report.buttons |= MOUSE_BTN5;
+    else if (code == KC_MS_ACCEL0)   mousekey_accel |= (1<<0);
+    else if (code == KC_MS_ACCEL1)   mousekey_accel |= (1<<1);
+    else if (code == KC_MS_ACCEL2)   mousekey_accel |= (1<<2);
 }
 
 void mousekey_off(uint8_t code)
@@ -171,6 +160,9 @@ void mousekey_off(uint8_t code)
     else if (code == KC_MS_BTN3) mouse_report.buttons &= ~MOUSE_BTN3;
     else if (code == KC_MS_BTN4) mouse_report.buttons &= ~MOUSE_BTN4;
     else if (code == KC_MS_BTN5) mouse_report.buttons &= ~MOUSE_BTN5;
+    else if (code == KC_MS_ACCEL0) mousekey_accel &= ~(1<<0);
+    else if (code == KC_MS_ACCEL1) mousekey_accel &= ~(1<<1);
+    else if (code == KC_MS_ACCEL2) mousekey_accel &= ~(1<<2);
 
     if (mouse_report.x == 0 && mouse_report.y == 0 && mouse_report.v == 0 && mouse_report.h == 0)
         mousekey_repeat = 0;
@@ -186,17 +178,19 @@ void mousekey_send(void)
 void mousekey_clear(void)
 {
     mouse_report = (report_mouse_t){};
+    mousekey_repeat = 0;
+    mousekey_accel = 0;
 }
 
 static void mousekey_debug(void)
 {
     if (!debug_mouse) return;
-    print("mousekey [btn|x y v h]rep: [");
+    print("mousekey [btn|x y v h](rep/acl): [");
     phex(mouse_report.buttons); print("|");
     phex(mouse_report.x); print(" ");
     phex(mouse_report.y); print(" ");
     phex(mouse_report.v); print(" ");
-    phex(mouse_report.h); print("]");
-    phex(mousekey_repeat);
-    print("\n");
+    phex(mouse_report.h); print("](");
+    phex(mousekey_repeat); print("/");
+    phex(mousekey_accel); print(")\n");
 }
diff --git a/common/mousekey.h b/common/mousekey.h
index 3006c463..ac26a46c 100644
--- a/common/mousekey.h
+++ b/common/mousekey.h
@@ -21,6 +21,45 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <stdbool.h>
 #include "host.h"
 
+
+/* max value on report descriptor */
+#define MOUSEKEY_MOVE_MAX       127
+#define MOUSEKEY_WHEEL_MAX      127
+
+#ifndef MOUSEKEY_MOVE_DELTA
+#define MOUSEKEY_MOVE_DELTA     5
+#endif
+#ifndef MOUSEKEY_WHEEL_DELTA
+#define MOUSEKEY_WHEEL_DELTA    1
+#endif
+#ifndef MOUSEKEY_DELAY
+#define MOUSEKEY_DELAY 300
+#endif
+#ifndef MOUSEKEY_INTERVAL
+#define MOUSEKEY_INTERVAL 50
+#endif
+#ifndef MOUSEKEY_MAX_SPEED
+#define MOUSEKEY_MAX_SPEED 10
+#endif
+#ifndef MOUSEKEY_TIME_TO_MAX
+#define MOUSEKEY_TIME_TO_MAX 20
+#endif
+#ifndef MOUSEKEY_WHEEL_MAX_SPEED
+#define MOUSEKEY_WHEEL_MAX_SPEED 16
+#endif
+#ifndef MOUSEKEY_WHEEL_TIME_TO_MAX
+#define MOUSEKEY_WHEEL_TIME_TO_MAX 40
+#endif
+
+
+uint8_t mk_delay;
+uint8_t mk_interval;
+uint8_t mk_max_speed;
+uint8_t mk_time_to_max;
+uint8_t mk_wheel_max_speed;
+uint8_t mk_wheel_time_to_max;
+
+
 void mousekey_task(void);
 void mousekey_on(uint8_t code);
 void mousekey_off(uint8_t code);