diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..586c0d7
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,131 @@
+// Type definitions for phonegap-plugin-mobile-accessibility
+// Project: https://github.com/phonegap/phonegap-mobile-accessibility
+
+
+// https://github.com/phonegap/phonegap-mobile-accessibility/blob/master/www/MobileAccessibilityNotifications.js
+declare const MobileAccessibilityNotifications = {
+    /* MobileAccessibility window events */
+    SCREEN_READER_STATUS_CHANGED : "screenreaderstatuschanged",
+    CLOSED_CAPTIONING_STATUS_CHANGED : "closedcaptioningstatuschanged",
+    GUIDED_ACCESS_STATUS_CHANGED : "guidedaccessstatuschanged",
+    INVERT_COLORS_STATUS_CHANGED : "invertcolorsstatuschanged",
+    MONO_AUDIO_STATUS_CHANGED : "monoaudiostatuschanged",
+    REDUCE_MOTION_STATUS_CHANGED : "reducemotionstatuschanged",
+    TOUCH_EXPLORATION_STATUS_CHANGED : "touchexplorationstatechanged",
+    BOLD_TEXT_STATUS_CHANGED : "boldtextstatuschanged",
+    DARKER_SYSTEM_COLORS_STATUS_CHANGED : "darkersystemcolorsstatuschanged",
+    GRAYSCALE_STATUS_CHANGED : "grayscalestatuschanged",
+    REDUCE_TRANSPARENCY_STATUS_CHANGED : "reducetransparencystatuschanged",
+    SPEAK_SCREEN_STATUS_CHANGED : "speakscreenstatuschanged",
+    SPEAK_SELECTION_STATUS_CHANGED : "speakselectionstatuschanged",
+    SWITCH_CONTROL_STATUS_CHANGED : "switchcontrolstatuschanged",
+
+    /* iOS specific UIAccessibilityNotifications  */
+    SCREEN_CHANGED : 1000,
+    LAYOUT_CHANGED : 1001,
+    ANNOUNCEMENT : 1008,
+    PAGE_SCROLLED : 1009,
+
+    /* Windows specific high contrast event  */
+    HIGH_CONTRAST_CHANGED : "highcontrastchanged"
+};
+
+interface MobileAccessibilityNotificationsEventMap {
+    "boldtextstatuschanged": { isBoldTextEnabled?: boolean };
+    "closedcaptioningstatuschanged": { isClosedCaptioningEnabled?: boolean };
+    "darkersystemcolorsstatuschanged": { isDarkerSystemColorsEnabled?: boolean };
+    "grayscalestatuschanged": { isGrayscaleEnabled?: boolean };
+    "guidedaccessstatuschanged": { isGuidedAccessEnabled?: boolean };
+    "invertcolorsstatuschanged": { isInvertColorsEnabled?: boolean };
+    "monoaudiostatuschanged": { isMonoAudioEnabled?: boolean };
+    "reducemotionstatuschanged": { isReduceMotionEnabled?: boolean };
+    "reducetransparencystatuschanged": { isReduceTransparencyEnabled?: boolean };
+    "screenreaderstatuschanged": { isScreenReaderRunning?: boolean };
+    "speakscreenstatuschanged": { isSpeakScreenEnabled?: boolean };
+    "speakselectionstatuschanged": { isSpeakSelectionEnabled?: boolean };
+    "switchcontrolstatuschanged": { isSwitchControlRunning?: boolean };
+    "touchexplorationstatuschanged": { isTouchExplorationEnabled?: boolean };
+}
+
+interface Window {
+    MobileAccessibility: MobileAccessibility;
+    addEventListener<K extends keyof MobileAccessibilityNotificationsEventMap>(
+        type: K,
+        listener: (info: undefined | MobileAccessibilityNotificationsEventMap[K]) => any
+    ): void;
+}
+
+interface MobileAccessibility {
+    isScreenReaderRunning(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isVoiceOverRunning(cb: (yes: boolean) => void): void;
+
+    /** android only */
+    isTalkBackRunning(cb: (yes: boolean) => void): void;
+
+    /** android only */
+    isChromeVoxActive(): boolean;
+
+    /** iOS only */
+    isBoldTextEnabled(cb: (yes: boolean) => void): void;
+
+    isClosedCaptioningEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isDarkerSystemColorsEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isGrayscaleEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isGuidedAccessEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isInvertColorsEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isMonoAudioEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isReduceMotionEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isReduceTransparencyEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isSpeakScreenEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isSpeakSelectionEnabled(cb: (yes: boolean) => void): void;
+
+    /** iOS only */
+    isSwitchControlRunning(cb: (yes: boolean) => void): void;
+
+    /** android only */
+    isTouchExplorationEnabled(cb: (yes: boolean) => void): void;
+
+    getTextZoom(cb: (textZoom: number) => void): void;
+    setTextZoom(textZoom: number, cb: (textZoom: number) => void): void;
+    updateTextZoom(cb: (textZoom: number) => void): void;
+    usePreferredTextZoom(usePreferredTextZoom: boolean): void;
+
+    /** iOS only */
+    postNotification(mobileAccessibilityNotification:
+                         typeof MobileAccessibilityNotifications.SCREEN_CHANGED |
+                         typeof MobileAccessibilityNotifications.LAYOUT_CHANGED |
+                         typeof MobileAccessibilityNotifications.ANNOUNCEMENT |
+                         typeof MobileAccessibilityNotifications.PAGE_SCROLLED,
+                     s: string,
+                     callback: (info: undefined | {stringValue: string; wasSuccessful: boolean}) => void): void;
+
+    /**
+     * @param {string} s A string to be announced by a screen reader.
+     * @param {0 | 1} queueMode Valid modes are 0 for flush; 1 for queue.
+     * @param {Object} properties Speech properties to use for this utterance.
+     */
+    speak(s: string, queueMode?: 0 | 1, properties?: object): void;
+
+    /** Stops speech */
+    stop(): void;
+}