diff --git a/.npmignore b/.npmignore
index 91ea732..f941ee8 100644
--- a/.npmignore
+++ b/.npmignore
@@ -4,6 +4,7 @@
 # but not these files...
 !DetectRTC.js
 !DetectRTC.min.js
+!DetectRTC.d.ts
 !index.html
 !package.json
 !npm-test.js
diff --git a/DetectRTC.d.ts b/DetectRTC.d.ts
new file mode 100644
index 0000000..30ad697
--- /dev/null
+++ b/DetectRTC.d.ts
@@ -0,0 +1,77 @@
+interface Device {
+  deviceId: string;
+  groupId: string;
+  id: string;
+  isCustomLabel?: boolean;
+  kind: string;
+  label: string;
+}
+
+namespace DetectRTC {
+  export function load(callback: () => void): void;
+  export const version: string;
+  export const osName: string;
+  export const osVersion: string;
+
+  export const hasWebcam: boolean;
+  export const hasMicrophone: boolean; // (has microphone device!)
+  export const hasSpeakers: boolean; // (has speakers!)
+
+  export const isApplyConstraintsSupported: boolean;
+  export const isAudioContextSupported: boolean;
+  export const isCanvasSupportsStreamCapturing: boolean;
+  export const isCreateMediaStreamSourceSupported: boolean;
+  export const isGetUserMediaSupported: boolean;
+  export const isMobileDevice: boolean;
+  export const isMultiMonitorScreenCapturingSupported: boolean;
+  export const isORTCSupported: boolean;
+  export const isPromisesSupported: boolean;
+  export const isRTPSenderReplaceTracksSupported: boolean;
+  export const isRemoteStreamProcessingSupported: boolean;
+  export const isRtpDataChannelsSupported: boolean;
+  export const isScreenCapturingSupported: boolean; // Chrome, Firefox, Opera, Edge and Android
+  export const isSctpDataChannelsSupported: boolean;
+  export const isSetSinkIdSupported: boolean;
+  export const isVideoSupportsStreamCapturing: boolean;
+  export const isWebRTCSupported: boolean;
+  export const isWebSocketsBlocked: boolean;
+  export const isWebSocketsSupported: boolean;
+
+  export const isWebsiteHasMicrophonePermissions: boolean; // getUserMedia allowed for HTTPs domain in Chrome?
+  export const isWebsiteHasWebcamPermissions: boolean; // getUserMedia allowed for HTTPs domain in Chrome?
+
+  export const isDesktopCapturingSupported: boolean;
+
+  export function checkWebSocketsSupport(callback: () => void);
+
+  export const audioInputDevices: Device[]; // microphones
+  export const audioOutputDevices: Device[]; // speakers
+  export const videoInputDevices: Device[]; // cameras
+
+  export const displayAspectRatio: string;
+  export const displayResolution: string;
+
+  export const browser: {
+    name: "Edge" | "Chrome" | "Firefox" | string;
+    version: string | number;
+    fullVersion: string;
+    isChrome?: boolean;
+    isFirefox?: boolean;
+    isOpera?: boolean;
+    isIE?: boolean;
+    isSafari?: boolean;
+    isEdge?: boolean;
+
+    isPrivateBrowsing?: boolean; // incognito or private modes
+  };
+
+  export function DetectLocalIPAddress(
+    callback: (localIpAddress: string) => void
+  );
+
+  export const MediaDevices: Device[];
+  export const MediaStream: string[];
+  export const MediaStreamTrack: string[];
+  export const RTCPeerConnection: string[];
+}
+export = DetectRTC;
diff --git a/package.json b/package.json
index af99d25..d3410e9 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
         "test": "./node_modules/.bin/protractor test/browserstack.config.js"
     },
     "main": "DetectRTC.js",
+    "types": "DetectRTC.d.ts",
     "keywords": [
         "webrtc",
         "detectrtc",