diff --git a/APP/main.c b/APP/main.c
index 837a7eb..9aa8814 100644
--- a/APP/main.c
+++ b/APP/main.c
@@ -16,6 +16,12 @@ static key_t s_keys[] = {
 
 static ThisDevice_t this_device;
 
+static void mf_led_rgb_set(bool red, bool green, bool blue) {
+  port_led_r_set(red);
+  port_led_g_set(green);
+  port_led_b_set(blue);
+}
+
 static void mf_init_all_subdevice_state() {
   port_debug_set(false);
   port_fan_set(false);
@@ -67,6 +73,13 @@ static void mf_process_level_key(key_t *key) {
     return;
   }
   printf("key name:%s\n", key->name);
+
+  if (this_device.ozone_level == level_high) {
+    this_device.ozone_level = level_low;
+  } else if (this_device.ozone_level == level_low) {
+    this_device.ozone_level = level_high;
+  }
+
   return;
 }
 static void mf_process_timer_key(key_t *key) {
@@ -101,7 +114,13 @@ static void onkey(key_t *key, key_state_t key_state) {
 key_module_t key_module = key_module_init(s_keys, onkey);
 
 //等级处理
-void device_level_process() {}
+void device_level_process() {
+  if (this_device.ozone_level == level_low) {
+    mf_led_rgb_set(true, false, false);
+  } else if (this_device.ozone_level == level_high) {
+    mf_led_rgb_set(false, false, true);
+  }
+}
 //定时处理
 void device_time_process() {}
 
@@ -150,7 +169,7 @@ int main() {
     END();
 
     // debug light
-    DO_IT_EACH_MS(150) { flip_debuf_light_level(); }
+    DO_IT_EACH_MS(200) { flip_debuf_light_level(); }
     END();
 
     hcis_shcedule();