diff --git a/headphones/admin.py b/headphones/admin.py
index 77711ce..8ada4fb 100644
--- a/headphones/admin.py
+++ b/headphones/admin.py
@@ -390,6 +390,20 @@ class NoiseCancellationTypeAdmin(admin.ModelAdmin):
     prepopulated_fields = {'slug': ('name',)}
 
 
+@admin.register(HeadphonesMicrophoneType)
+class HeadphonesMicrophoneTypeAdmin(admin.ModelAdmin):
+    list_display = ('type', 'description')
+    search_fields = ('type',)
+    prepopulated_fields = {'type': ('description',)}
+
+
+@admin.register(HeadphonesCaseIP)
+class HeadphonesCaseIPAdmin(admin.ModelAdmin):
+    list_display = ('code', 'description')
+    search_fields = ('code',)
+    prepopulated_fields = {'code': ('description',)}
+
+
 @admin.register(CodecType)
 class CodecTypeAdmin(admin.ModelAdmin):
     list_display = ('name',)
diff --git a/headphones/models.py b/headphones/models.py
index a1a38f7..eae290f 100644
--- a/headphones/models.py
+++ b/headphones/models.py
@@ -206,7 +206,7 @@ class DriverModel(models.Model):
 
 class DriverType(models.Model):
     name = models.CharField(max_length=50, verbose_name="Тип драйвера")
-    encoding = models.CharField(blank=True, max_length=10, verbose_name="Буквенное обозначение>")
+    encoding = models.CharField(blank=True, max_length=10, verbose_name="Буквенное обозначение")
     slug = models.SlugField(unique=True, verbose_name="URL-идентификатор")
 
     class Meta:
@@ -622,7 +622,22 @@ class HeadphonesMicrophoneType(models.Model):
     description = models.CharField(blank=True, verbose_name="Описание")
 
     class Meta:
-        verbose_name = "Тип микрофона"
+        verbose_name = "Ресурс обзора"
+
+    def __str__(self):
+        return self.type
+
+
+class HeadphonesCaseIP(models.Model):
+    code = models.CharField(max_length=50, verbose_name="Код степени защиты")
+    description = models.CharField(blank=True, verbose_name="Описание степени защиты")
+
+    class Meta:
+        verbose_name = "Степень защиты"
+
+    def __str__(self):
+        return self.code
+
 
 # ======================
 # Основная модель наушников
@@ -744,9 +759,12 @@ class Headphones(models.Model):
     )
 
     # Дополнительные функции
-    microphone = models.BooleanField(
-        verbose_name="Встроенный микрофон",
-        default=False,
+    microphone = models.ForeignKey(
+        HeadphonesMicrophoneType,
+        on_delete=models.PROTECT,
+        null=True,
+        blank=True,
+        verbose_name="Тип микрофона",
     )
     noise_cancellation = models.ForeignKey(
         NoiseCancellationType,
@@ -755,8 +773,10 @@ class Headphones(models.Model):
         blank=True,
         verbose_name="Шумоподавление",
     )
-    ip_rating = models.CharField(
-        max_length=10,
+    ip_rating = models.ForeignKey(
+        HeadphonesCaseIP,
+        on_delete=models.PROTECT,
+        null=True,
         blank=True,
         help_text="Например: IPX4",
         verbose_name="Степень защиты (IP)",