diff --git a/README.md b/README.md
index ee128d0..bc45a84 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Speaks the text your specify by using the Speech library (SAPI) that comes with
 
 ```ts
 import * as swissKnife from "https://deno.land/x/swissKnife/mod.ts"
-let res = await swissKnife.speak("Hello from the other world")
+await swissKnife.speak("Hello from the other world")
 ```
 
 Run your script file:
@@ -34,7 +34,7 @@ You can also set the rate and the volume:
 
 ```ts
 import * as swissKnife from "https://deno.land/x/swissKnife/mod.ts"
-let res = await swissKnife.speak("Hello from the other world", {rate: 3, volume: 80})
+await swissKnife.speak("Hello from the other world", {rate: 3, volume: 80})
 //rate: -10 -> 10
 //volume: 0% -> 100%
 ```
@@ -88,28 +88,28 @@ With swissKnife you can take a screenshot of the full screen, dual screen and ac
 
 ```ts
 //Save the primary screen image.
-let res = await swissKnife.screenshot("c:\\myfolder\\myfile.png")
+await swissKnife.screenshot("c:\\myfolder\\myfile.png")
 ```
 
 Also you can specify Dual monitor:
 
 ```ts
 //take a screenshot of both screens
-let res = await swissKnife.screenshot("c:\\myfolder\\myfile.png", "Dual")
+await swissKnife.screenshot("c:\\myfolder\\myfile.png", "Dual")
 ```
 
 Also you can specify the current active window:
 
 ```ts
 //take a screenshot of both screens
-let res = await swissKnife.screenshot("c:\\myfolder\\myfile.png", "Window")
+await swissKnife.screenshot("c:\\myfolder\\myfile.png", "Window")
 ```
 
 The third parameter allows you to specify the coordinates, width and height of the area:
 
 ```ts
 //take a screenshot of both screens
-let res = await swissKnife.screenshot("c:\\myfolder\\myfile.png", "Single", {
+await swissKnife.screenshot("c:\\myfolder\\myfile.png", "Single", {
     x: 10,
     y: 30,
     width: 200,
@@ -163,6 +163,19 @@ This method allows you to hide, show, minimize, maximize, flush ... windows form
 await swissKnife.winAction("Untit", "Contains", "Flash")
 ```
 
+## Window Power
+This method allows you to Logoff, Power Off and Stand by the system.
+
+`power(mode:PowerMode)`
+
+- mode: Supported values Logoff, Power off and Standby
+
+```ts
+import * as swissKnife from "https://deno.land/x/swissKnife/mod.ts"
+//Standby the system
+await swissKnife.power("StandBy")
+```
+
 ## License
 
 [MIT](LICENSE)
diff --git a/mod.ts b/mod.ts
index 9512e41..fe0e6ca 100644
--- a/mod.ts
+++ b/mod.ts
@@ -3,6 +3,7 @@ import type { Screen, Monitor } from "./src/models/screen.ts"
 import type { SpeakOptions } from "./src/models/speakOptions.ts"
 import type { Find } from "./src/models/findMode.ts"
 import type { WinActions } from "./src/models/winActions.ts"
+import { PowerMode } from "./src/models/powerMode.ts";
 
 
 /**
@@ -327,6 +328,64 @@ export async function playMp3(mp3Path: string): Promise<boolean> {
     return exitCode === 0
 }
 
+
+/**
+ * Turn off the monitor
+ * @date 12/23/2023 - 4:28:24 PM
+ *
+ * @example
+ * ```ts
+ * import * as swissKnife from "https://deno.land/x/swissKnife/mod.ts"
+ * await swissKnife.monitorOff() //turn off the monitor
+ * ```
+ * @export
+ * @async
+ * @returns {Promise<number>} process exit code.
+ */
+export async function monitorOff(): Promise<number> {
+    const args = [
+        "monitor",
+        "off",
+    ]
+    const exitCode = await runNirCmd(args);
+    return exitCode
+}
+
+
+/**
+ * Windows Power
+ * @date 12/23/2023 - 4:35:59 PM
+ *
+ * @example
+ * ```ts
+ * import * as swissKnife from "https://deno.land/x/swissKnife/mod.ts"
+ * await swissKnife.power("StandBy") //Windows standby
+ * //Supported: StandBy, Logoff and Poweroff
+ * ```
+ * @export
+ * @async
+ * @param {PowerMode} mode standby, logoff, poweroff
+ * @returns {Promise<number>} process exit code
+ */
+export async function power(mode:PowerMode): Promise<number> {
+    const args = [];
+    switch (mode) {
+        case "Logoff":
+            args.push("exitwin")
+            args.push("logoff")
+            break;
+        case "StandBy":
+            args.push("standby")
+            break;
+        case "PowerOff":
+            args.push("exitwin")
+            args.push("poweroff")
+            break;
+    }
+    const exitCode = await runNirCmd(args);
+    return exitCode
+}
+
 async function runNirCmd(args: Array<string>): Promise<number> {
     const OS = utils.getOS();
 
diff --git a/src/models/powerMode.ts b/src/models/powerMode.ts
new file mode 100644
index 0000000..e50bbbe
--- /dev/null
+++ b/src/models/powerMode.ts
@@ -0,0 +1 @@
+export type PowerMode = "StandBy" | "Logoff" | "PowerOff"
\ No newline at end of file