diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..c8ebe9d
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,64 @@
+declare class InCallManager {
+  vibrate: boolean;
+  audioUriMap: {
+    ringtone: { _BUNDLE_: null; _DEFAULT_: null };
+    ringback: { _BUNDLE_: null; _DEFAULT_: null };
+    busytone: { _BUNDLE_: null; _DEFAULT_: null };
+  };
+
+  constructor();
+
+  start(setup?: {
+    auto?: boolean;
+    media?: "video" | "audio";
+    ringback?: string;
+  }): void;
+
+  stop(setup?: { busytone?: string }): void;
+
+  turnScreenOff(): void;
+
+  turnScreenOn(): void;
+
+  getIsWiredHeadsetPluggedIn(): Promise<{ isWiredHeadsetPluggedIn: boolean }>;
+
+  setFlashOn(enable: boolean, brightness: number): void;
+
+  setKeepScreenOn(enable: boolean): void;
+
+  setSpeakerphoneOn(enable: boolean): void;
+
+  setForceSpeakerphoneOn(flag: boolean): void;
+
+  setMicrophoneMute(enable: boolean): void;
+
+  startRingtone(
+    ringtone: string,
+    vibrate_pattern: number | number[],
+    ios_category: string,
+    seconds: number
+  ): void;
+
+  stopRingtone(): void;
+
+  startProximitySensor(): void;
+
+  stopProximitySensor(): void;
+
+  startRingback(ringback: string): void;
+
+  stopRingback(): void;
+
+  pokeScreen(timeout: number): void;
+
+  getAudioUri(audioType: string, fileType: string): Promise<string | null>;
+
+  chooseAudioRoute(route: string): Promise<any>;
+
+  requestAudioFocus(): Promise<any>;
+
+  abandonAudioFocus(): Promise<any>;
+}
+
+declare const inCallManager: InCallManager;
+export default inCallManager;