diff --git a/src/module.ts b/src/module.ts
index 73dd146..bd402ae 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -13,23 +13,7 @@ import {
 
 import { useContentStorage } from './runtime/storage/StorageManagement'
 import { updateCheck } from './runtime/update'
-
-export interface CmsUser {
-  name: string
-  password: string
-}
-
-export interface ModuleOptions {
-  users: CmsUser[]
-  secret: string
-  projectLocation: string
-  storage: {
-    type: 'azure-app-configuration' | 'cloudflare-kv-binding' | 'fs' | 'github' | 'mongodb' | 'netlify-blobs' | 'planetscale' | 'redis' | 'vercel-kv'
-    options: object
-  }
-  storageKey: string
-  deployHookURL?: string
-}
+import type { ModuleOptions } from './runtime/types/ModuleTypes'
 
 export default defineNuxtModule<ModuleOptions>({
   meta: {
@@ -48,8 +32,13 @@ export default defineNuxtModule<ModuleOptions>({
       },
     },
     storageKey: 'katze_content.json',
+    addons: {
+      deviceRecognition: {
+        defaultUserAgent: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36',
+      },
+    },
   },
-  async setup(_options, _nuxt) {
+  async setup(_options: ModuleOptions, _nuxt) {
     const resolver = createResolver(import.meta.url)
     updateCheck().then(
       ({ currentVersion, latestVersion }) => {
@@ -78,6 +67,9 @@ export default defineNuxtModule<ModuleOptions>({
     _nuxt.options.runtimeConfig.projectLocation = _options.projectLocation + (_options.projectLocation.endsWith('/') ? '' : '/')
     _nuxt.options.runtimeConfig.deployHookURL = _options.deployHookURL
 
+    // ADDONS
+    _nuxt.options.runtimeConfig.public.deviceRecognition = _options.addons.deviceRecognition
+
     // LOAD CONTENT STORAGE
     const contentStorage = await useContentStorage(_nuxt.options.runtimeConfig)
     let content = await contentStorage.getItem(_options.storageKey)
diff --git a/src/runtime/composables/useDeviceType.ts b/src/runtime/composables/useDeviceType.ts
new file mode 100644
index 0000000..0650f26
--- /dev/null
+++ b/src/runtime/composables/useDeviceType.ts
@@ -0,0 +1,46 @@
+import { onMounted, onUnmounted, ref, useNuxtApp, useRuntimeConfig } from '#imports'
+import type { DeviceTypes } from '~/src/runtime/types/DeviceTypes'
+import type { AddonDeviceRecognition } from '~/src/runtime/types/ModuleTypes'
+
+export const useDeviceType = () => {
+  const deviceType = useNuxtApp().$device as DeviceTypes
+  const { isTablet, isDesktop } = deviceType
+
+  const runtimeConfig = useRuntimeConfig()
+  const deviceRecognition = runtimeConfig.public.deviceRecognition as AddonDeviceRecognition
+  const { responsiveContainerClass } = deviceRecognition
+
+  const isMobile = ref(deviceType.isMobile)
+  const resizeListener = (containerClass: string) => {
+    // get div @container width
+    const container = document.querySelector(containerClass)
+    if (container) {
+      const containerWidth = container.clientWidth
+      isMobile.value = containerWidth < 768
+    }
+  }
+
+  const addResizeListener = (containerClass: string) => {
+    // add resize listener to .page-size element
+    const resizeObserver = new ResizeObserver(() => resizeListener(containerClass))
+    const container = document.querySelector(containerClass)
+    if (container) {
+      resizeObserver.observe(container)
+    }
+    resizeListener(containerClass)
+  }
+  if (responsiveContainerClass) {
+    const resizeEvent = () => resizeListener(responsiveContainerClass)
+    onMounted(() => {
+      if (responsiveContainerClass) {
+        addResizeListener(responsiveContainerClass)
+        window.addEventListener('resize', resizeEvent)
+      }
+    })
+
+    onUnmounted(() => {
+      window.removeEventListener('resize', resizeEvent)
+    })
+  }
+  return { isMobile, isTablet, isDesktop }
+}
diff --git a/src/runtime/plugins/device.plugin.ts b/src/runtime/plugins/device.plugin.ts
new file mode 100644
index 0000000..ed7b0e4
--- /dev/null
+++ b/src/runtime/plugins/device.plugin.ts
@@ -0,0 +1,66 @@
+import { reactive } from 'vue'
+import type { AddonDeviceRecognition } from '../types/ModuleTypes'
+import { defineNuxtPlugin, useRuntimeConfig, useRequestHeaders } from '#imports'
+import type { DeviceTypes } from '~/src/runtime/types/DeviceTypes'
+
+export default defineNuxtPlugin((nuxtApp) => {
+  const runtimeConfig = useRuntimeConfig()
+
+  const deviceRecognition = runtimeConfig.public.deviceRecognition as AddonDeviceRecognition
+  const { defaultUserAgent } = deviceRecognition
+
+  // Server Side
+  if (nuxtApp.ssrContext) {
+    const headers = useRequestHeaders()
+    const userAgent = headers['user-agent'] || defaultUserAgent
+
+    const types = reactive(getDeviceType(userAgent, headers))
+
+    return {
+      provide: {
+        device: types,
+      },
+    }
+  }
+
+  // Client Side
+  const userAgent = navigator.userAgent || defaultUserAgent
+  const types = reactive(getDeviceType(userAgent))
+
+  return {
+    provide: {
+      device: types,
+    },
+  }
+})
+
+const getDeviceType = (userAgent: string, headers?: Record<string, string>): DeviceTypes => {
+  let isMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(userAgent)
+  let isTablet = /iPad/i.test(userAgent)
+  let isDesktop = !isMobile && !isTablet
+
+  if (!headers) {
+    return {
+      isMobile,
+      isTablet,
+      isDesktop,
+    }
+  }
+
+  if (userAgent === 'Amazon CloudFront') {
+    isMobile = headers['cloudfront-is-mobile-viewer'] === 'true'
+    isTablet = headers['cloudfront-is-tablet-viewer'] === 'true'
+    isDesktop = headers['cloudfront-is-desktop-viewer'] === 'true'
+  }
+  else if (headers['cf-device-type']) { // Cloudflare
+    isMobile = headers['cf-device-type'] === 'mobile'
+    isTablet = headers['cf-device-type'] === 'tablet'
+    isDesktop = headers['cf-device-type'] === 'desktop'
+  }
+
+  return {
+    isMobile,
+    isTablet,
+    isDesktop,
+  }
+}
diff --git a/src/runtime/types/DeviceTypes.ts b/src/runtime/types/DeviceTypes.ts
new file mode 100644
index 0000000..588951b
--- /dev/null
+++ b/src/runtime/types/DeviceTypes.ts
@@ -0,0 +1,5 @@
+export interface DeviceTypes {
+  isMobile: boolean
+  isTablet: boolean
+  isDesktop: boolean
+}
diff --git a/src/runtime/types/ModuleTypes.ts b/src/runtime/types/ModuleTypes.ts
new file mode 100644
index 0000000..0d474d0
--- /dev/null
+++ b/src/runtime/types/ModuleTypes.ts
@@ -0,0 +1,24 @@
+export interface CmsUser {
+  name: string
+  password: string
+}
+
+export interface ModuleOptions {
+  users: CmsUser[]
+  secret: string
+  projectLocation: string
+  storage: {
+    type: 'azure-app-configuration' | 'cloudflare-kv-binding' | 'fs' | 'github' | 'mongodb' | 'netlify-blobs' | 'planetscale' | 'redis' | 'vercel-kv'
+    options: object
+  }
+  storageKey: string
+  deployHookURL?: string
+  addons: {
+    deviceRecognition: AddonDeviceRecognition
+  }
+}
+
+export interface AddonDeviceRecognition {
+  defaultUserAgent: string
+  responsiveContainerClass?: string
+}