diff --git a/Kconfig b/Kconfig
index c7a5c69..aeef6da 100644
--- a/Kconfig
+++ b/Kconfig
@@ -5,6 +5,37 @@ menu "ESP CherryUSB"
     config CHERRYUSB_SUPPORTED
         bool
         default y if IDF_TARGET_ESP32S2 || IDF_TARGET_ESP32S3
+
+    choice USB_DBG_LEVEL
+        bool "Default log verbosity"
+        default USB_DBG_LEVEL_INFO
+        help
+            Specify how much output to see in logs by default.
+            You can set lower verbosity level at runtime using
+            esp_log_level_set function.
+
+            By default, this setting limits which log statements
+            are compiled into the program. For example, selecting
+            "Warning" would mean that changing log level to "Debug"
+            at runtime will not be possible. To allow increasing log
+            level above the default at runtime, see the next option.
+
+        config USB_DBG_LEVEL_ERROR
+            bool "Error"
+        config USB_DBG_LEVEL_WARN
+            bool "Warning"
+        config USB_DBG_LEVEL_INFO
+            bool "Info"
+        config USB_DBG_LEVEL_DEBUG
+            bool "Debug"
+    endchoice
+
+    config USB_DBG_LEVEL
+        int
+        default 0 if USB_DBG_LEVEL_ERROR
+        default 1 if USB_DBG_LEVEL_WARN
+        default 2 if USB_DBG_LEVEL_INFO
+        default 3 if USB_DBG_LEVEL_DEBUG
         
     menuconfig CHERRYUSBD_ENABLED
         bool "Enable CherryUSB Device"
diff --git a/additions/esp_cherryusb.c b/additions/esp_cherryusb.c
index bbe8b5e..756a525 100644
--- a/additions/esp_cherryusb.c
+++ b/additions/esp_cherryusb.c
@@ -50,7 +50,7 @@ void usb_dc_low_level_init(void)
     }
 
     // TODO: Check when to enable interrupt
-    ret = esp_intr_alloc(ETS_USB_INTR_SOURCE, ESP_INTR_FLAG_LEVEL2, usb_interrupt_cb, 0, &s_interrupt_handle);
+    ret = esp_intr_alloc(ETS_USB_INTR_SOURCE, ESP_INTR_FLAG_LOWMED, usb_interrupt_cb, 0, &s_interrupt_handle);
     if (ret != ESP_OK) {
         USB_LOG_ERR("USB Interrupt Init Failed!\r\n");
         return;
diff --git a/examples/device/cherryusb_device_mtp/main/device_mtp_main.c b/examples/device/cherryusb_device_mtp/main/device_mtp_main.c
index d3a40fd..5e73e18 100644
--- a/examples/device/cherryusb_device_mtp/main/device_mtp_main.c
+++ b/examples/device/cherryusb_device_mtp/main/device_mtp_main.c
@@ -13,51 +13,7 @@
 #include "usbd_core.h"
 #include "usb_mtp.h"
 
-static char *TAG = "device_cdc_main";
-
-#define WCID_VENDOR_CODE 0x01
-
-__ALIGN_BEGIN const uint8_t WCID_StringDescriptor_MSOS[18] __ALIGN_END = {
-    ///////////////////////////////////////
-    /// MS OS string descriptor
-    ///////////////////////////////////////
-    0x12,                       /* bLength */
-    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
-    /* MSFT100 */
-    'M', 0x00, 'S', 0x00, 'F', 0x00, 'T', 0x00, /* wcChar_7 */
-    '1', 0x00, '0', 0x00, '0', 0x00,            /* wcChar_7 */
-    WCID_VENDOR_CODE,                           /* bVendorCode */
-    0x00,                                       /* bReserved */
-};
-
-__ALIGN_BEGIN const uint8_t WINUSB_WCIDDescriptor[40] __ALIGN_END = {
-    ///////////////////////////////////////
-    /// WCID descriptor
-    ///////////////////////////////////////
-    0x28, 0x00, 0x00, 0x00,                   /* dwLength */
-    0x00, 0x01,                               /* bcdVersion */
-    0x04, 0x00,                               /* wIndex */
-    0x01,                                     /* bCount */
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* bReserved_7 */
-
-    ///////////////////////////////////////
-    /// WCID function descriptor
-    ///////////////////////////////////////
-    0x00, /* bFirstInterfaceNumber */
-    0x01, /* bReserved */
-    /* MTP */
-    'M', 'T', 'P', 0x00, 0x00, 0x00, 0x00, 0x00, /* cCID_8 */
-    /*  */
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* cSubCID_8 */
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,             /* bReserved_6 */
-};
-
-struct usb_msosv1_descriptor msosv1_desc = {
-    .string = (uint8_t *)WCID_StringDescriptor_MSOS,
-    .vendor_code = WCID_VENDOR_CODE,
-    .compat_id = (uint8_t *)WINUSB_WCIDDescriptor,
-    .comp_id_property = NULL,
-};
+static char *TAG = "device_mtp_main";
 
 /*!< endpoint address */
 #define CDC_IN_EP  0x81
@@ -79,7 +35,7 @@ struct usb_msosv1_descriptor msosv1_desc = {
 #endif
 
 const uint8_t mtp_descriptor[] = {
-    USB_DEVICE_DESCRIPTOR_INIT(USB_2_1, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0201, 0x01),
+    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0201, 0x01),
     USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
     MTP_DESCRIPTOR_INIT(0x00, CDC_OUT_EP, CDC_IN_EP, CDC_INT_EP, MTP_MAX_MPS, 0x02),
     ///////////////////////////////////////
@@ -156,12 +112,6 @@ const uint8_t mtp_descriptor[] = {
     0x00
 };
 
-const uint8_t bos_descriptor[] = {
-    0x05, 0x0f, 0x16, 0x00, 0x02,
-    0x07, 0x10, 0x02, 0x06, 0x00, 0x00, 0x00,
-    0x0a, 0x10, 0x03, 0x00, 0x0f, 0x00, 0x01, 0x01, 0xf4, 0x01
-};
-
 void usbd_event_handler(uint8_t event)
 {
     switch (event) {
@@ -189,19 +139,12 @@ void usbd_event_handler(uint8_t event)
 
 struct usbd_interface intf0;
 
-struct usb_bos_descriptor bos_desc = {
-    .string = bos_descriptor,
-    .string_len = sizeof(bos_descriptor)
-};
-
 void app_main(void)
 {
     void sd_main(void);
     sd_main();
     uint32_t before = heap_caps_get_free_size(MALLOC_CAP_DEFAULT);
     usbd_desc_register(mtp_descriptor);
-    usbd_msosv1_desc_register(&msosv1_desc);
-    usbd_bos_desc_register(&bos_desc);
     usbd_add_interface(usbd_mtp_init_intf(&intf0, CDC_OUT_EP, CDC_IN_EP, CDC_INT_EP));
     usbd_initialize();
     while (1){
@@ -213,8 +156,6 @@ void app_main(void)
         now = heap_caps_get_free_size(MALLOC_CAP_DEFAULT);
         ESP_LOGW(TAG, "use %"PRIu32, before - now);
         usbd_desc_register(mtp_descriptor);
-        usbd_msosv1_desc_register(&msosv1_desc);
-        usbd_bos_desc_register(&bos_desc);
         usbd_add_interface(usbd_mtp_init_intf(&intf0, CDC_OUT_EP, CDC_IN_EP, CDC_INT_EP));
         usbd_initialize();
     }