diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 00000000..db7e90f2
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,92 @@
+import { EventEmitter } from "events";
+
+type ConnectOptions = {
+  share_mode?: number;
+  protocol?: number;
+};
+
+type Status = {
+  atr?: Buffer;
+  state: number;
+};
+
+type AnyOrNothing = any | undefined | null;
+
+interface PCSCLite extends EventEmitter {
+  on(type: "error", listener: (error: any) => void): this;
+  once(type: "error", listener: (error: any) => void): this;
+  on(type: "reader", listener: (reader: CardReader) => void): this;
+  once(type: "reader", listener: (reader: CardReader) => void): this;
+  close(): void;
+}
+
+interface CardReader extends EventEmitter {
+  // Share Mode
+  SCARD_SHARE_SHARED: number;
+  SCARD_SHARE_EXCLUSIVE: number;
+  SCARD_SHARE_DIRECT: number;
+  // Protocol
+  SCARD_PROTOCOL_T0: number;
+  SCARD_PROTOCOL_T1: number;
+  SCARD_PROTOCOL_RAW: number;
+  //  State
+  SCARD_STATE_UNAWARE: number;
+  SCARD_STATE_IGNORE: number;
+  SCARD_STATE_CHANGED: number;
+  SCARD_STATE_UNKNOWN: number;
+  SCARD_STATE_UNAVAILABLE: number;
+  SCARD_STATE_EMPTY: number;
+  SCARD_STATE_PRESENT: number;
+  SCARD_STATE_ATRMATCH: number;
+  SCARD_STATE_EXCLUSIVE: number;
+  SCARD_STATE_INUSE: number;
+  SCARD_STATE_MUTE: number;
+  // Disconnect disposition
+  SCARD_LEAVE_CARD: number;
+  SCARD_RESET_CARD: number;
+  SCARD_UNPOWER_CARD: number;
+  SCARD_EJECT_CARD: number;
+  name: string;
+  state: number;
+  connected: boolean;
+  on(type: "error", listener: (this: CardReader, error: any) => void): this;
+  once(type: "error", listener: (this: CardReader, error: any) => void): this;
+  on(type: "end", listener: (this: CardReader) => void): this;
+  once(type: "end", listener: (this: CardReader) => void): this;
+  on(
+    type: "status",
+    listener: (this: CardReader, status: Status) => void
+  ): this;
+  once(
+    type: "status",
+    listener: (this: CardReader, status: Status) => void
+  ): this;
+  SCARD_CTL_CODE(code: number): number;
+  get_status(
+    cb: (err: AnyOrNothing, state: number, atr?: Buffer) => void
+  ): void;
+  connect(callback: (err: AnyOrNothing, protocol: number) => void): void;
+  connect(
+    options: ConnectOptions,
+    callback: (err: AnyOrNothing, protocol: number) => void
+  ): void;
+  disconnect(callback: (err: AnyOrNothing) => void): void;
+  disconnect(disposition: number, callback: (err: AnyOrNothing) => void): void;
+  transmit(
+    data: Buffer,
+    res_len: number,
+    protocol: number,
+    cb: (err: AnyOrNothing, response: Buffer) => void
+  ): void;
+  control(
+    data: Buffer,
+    control_code: number,
+    res_len: number,
+    cb: (err: AnyOrNothing, response: Buffer) => void
+  ): void;
+  close(): void;
+}
+
+declare function pcsc(): PCSCLite;
+
+export = pcsc;