diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7e3b92..85d90d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+ - Added offline copy EM card uid for btnpress.(@nemanjan00)
  - Added offline copy ic card uid for btnpress.(@xianglin1998)
  - Added `hw settings btnpress` to get and set button press function.(@xianglin1998)
  - Added `hw battery` to get battery informartion (@xianglin1998)
diff --git a/firmware/application/src/app_main.c b/firmware/application/src/app_main.c
index 5a36c4d..ff1425d 100644
--- a/firmware/application/src/app_main.c
+++ b/firmware/application/src/app_main.c
@@ -511,6 +511,34 @@ static void btn_fn_copy_ic_uid(void) {
 
     nfc_tag_14a_coll_res_entity_t* antres;
 
+    if(tag_type[1] == TAG_TYPE_EM410X) {
+        uint8_t status;
+
+        bool is_reader_mode_now = get_device_mode() == DEVICE_MODE_READER;
+        // first, we need switch to reader mode.
+        if (!is_reader_mode_now) {
+            // enter reader mode
+            reader_mode_enter();
+            bsp_delay_ms(8);
+            NRF_LOG_INFO("Start reader mode to offline copy.")
+        }
+
+        uint8_t id_buffer[5] = { 0x00 };
+        status = PcdScanEM410X(id_buffer);
+
+        if(status == LF_TAG_OK) {
+            tag_data_buffer_t* buffer = get_buffer_by_tag_type(TAG_TYPE_EM410X);
+            memcpy(buffer->buffer, id_buffer, LF_EM410X_TAG_ID_SIZE);
+            tag_emulation_load_by_buffer(TAG_TYPE_EM410X, false);
+
+            // keep reader mode or exit reader mode.
+        }
+
+        if (!is_reader_mode_now) {
+            tag_mode_enter();
+        }
+    }
+
     switch(tag_type[0]) {
         case TAG_TYPE_MIFARE_Mini:
         case TAG_TYPE_MIFARE_1024:
diff --git a/firmware/application/src/rfid/nfctag/tag_emulation.c b/firmware/application/src/rfid/nfctag/tag_emulation.c
index b65da99..800b328 100644
--- a/firmware/application/src/rfid/nfctag/tag_emulation.c
+++ b/firmware/application/src/rfid/nfctag/tag_emulation.c
@@ -7,6 +7,7 @@
 #include "fds_util.h"
 #include "tag_emulation.h"
 #include "tag_persistence.h"
+#include "rgb_marquee.h"
 
 
 #define NRF_LOG_MODULE_NAME tag_emu
@@ -458,6 +459,7 @@ uint8_t tag_emulation_get_slot(void) {
  */
 void tag_emulation_set_slot(uint8_t index) {
     slotConfig.config.activated = index;    // 重设到新切换的卡槽上
+    rgb_marquee_reset(); // force animation color refresh according to new slot
 }
 
 /**
diff --git a/firmware/application/src/rgb_marquee.c b/firmware/application/src/rgb_marquee.c
index 9003982..335983b 100644
--- a/firmware/application/src/rgb_marquee.c
+++ b/firmware/application/src/rgb_marquee.c
@@ -50,6 +50,12 @@ void rgb_marquee_stop(void){
 	ledblink1_step = 0;
 }
 
+// reset RGB state machines to force a refresh of the LED color
+void rgb_marquee_reset(void){
+	ledblink6_step = 0;
+	ledblink1_step = 0;
+}
+
 // 亮度转PWM值
 uint16_t get_pwmduty(uint8_t light_level){
     return PWM_MAX-(PWM_MAX*pow(((double)light_level/LIGHT_LEVEL_MAX),2.2));
diff --git a/firmware/application/src/rgb_marquee.h b/firmware/application/src/rgb_marquee.h
index a6702ff..0af8a41 100644
--- a/firmware/application/src/rgb_marquee.h
+++ b/firmware/application/src/rgb_marquee.h
@@ -7,6 +7,7 @@
 
 void rgb_marquee_init(void);
 void rgb_marquee_stop(void);
+void rgb_marquee_reset(void);
 bool is_rgb_marquee_enable(void);
 void ledblink1(uint8_t color,uint8_t dir);
 void ledblink2(uint8_t color,uint8_t dir, uint8_t end);