diff --git a/multi_timer.c b/multi_timer.c
old mode 100644
new mode 100755
index feb9cae..3d49873
--- a/multi_timer.c
+++ b/multi_timer.c
@@ -18,12 +18,14 @@ static uint32_t _timer_ticks = 0;
   * @param  repeat: repeat interval time.
   * @retval None
   */
-void timer_init(struct Timer* handle, void (*timeout_cb)(), uint32_t timeout, uint32_t repeat)
+void timer_init(struct Timer* handle, void (*timeout_cb)(void *arg), \
+      uint32_t timeout, uint32_t repeat, void *arg)
 {
     // memset(handle, sizeof(struct Timer), 0);
     handle->timeout_cb = timeout_cb;
     handle->timeout    = _timer_ticks + timeout;
     handle->repeat     = repeat;
+    handle->arg        = arg;
 }
 
 /**
@@ -86,18 +88,18 @@ void timer_loop(void)
             {
                 target->timeout = _timer_ticks + target->repeat;
             }
-            target->timeout_cb();
+            target->timeout_cb(target->arg);
         }
     }
 }
 
 /**
-  * @brief  background ticks, timer repeat invoking interval 1ms.
+  * @brief  background ticks, timer repeat invoking interval nms.
   * @param  None.
   * @retval None.
   */
 void timer_ticks(void)
 {
-    _timer_ticks++;
+    _timer_ticks += CFG_TIMER_1_TICK_N_MS;
 }
 
diff --git a/multi_timer.h b/multi_timer.h
old mode 100644
new mode 100755
index edc3e38..0f60453
--- a/multi_timer.h
+++ b/multi_timer.h
@@ -9,18 +9,26 @@
 #include "stdint.h"
 #include "stddef.h"
 
+/*
+It means 1 tick for 1ms. 
+Your can configurate for your tick time such as 5ms/10ms and so on.
+*/
+#define CFG_TIMER_1_TICK_N_MS   1
+
 typedef struct Timer {
-    uint32_t timeout;
-    uint32_t repeat;
-    void (*timeout_cb)(void);
-    struct Timer* next;
-}Timer;
+    uint32_t        timeout;
+    uint32_t        repeat;
+    void *          arg; /* Input argument for timeout_cb function */
+    void            (*timeout_cb)(void *arg);
+    struct Timer*   next;
+} Timer;
 
 #ifdef __cplusplus  
 extern "C" {  
 #endif  
 
-void timer_init(struct Timer* handle, void(*timeout_cb)(), uint32_t timeout, uint32_t repeat);
+void timer_init(struct Timer* handle, void(*timeout_cb)(void *arg), \
+            uint32_t timeout, uint32_t repeat, void *arg);
 int  timer_start(struct Timer* handle);
 void timer_stop(struct Timer* handle);
 void timer_ticks(void);