diff --git a/src/Accessories/ControlUnit.ts b/src/Accessories/ControlUnit.ts
index 3e99062..eecf3c1 100644
--- a/src/Accessories/ControlUnit.ts
+++ b/src/Accessories/ControlUnit.ts
@@ -198,9 +198,15 @@ export class ControlUnit implements IAccessory {
             .on("set", callbackify(this.onSetVolumeSelector));
     }
 
-    //TODO
+    /**
+     * Event handler for SET volume characteristic
+     */
     private onSetVolumeSelector = async (value: any) => {
         this.log(`set volume + ${value}`);
+        switch (value) {
+            case 0: this.dataProvider.volumeUp(this.name); break;
+            case 1: this.dataProvider.volumeDown(this.name); break;
+        }
     }
 
     /*********************
diff --git a/src/DataProviders/HarmonyDataProvider.ts b/src/DataProviders/HarmonyDataProvider.ts
index d353d62..26d017d 100644
--- a/src/DataProviders/HarmonyDataProvider.ts
+++ b/src/DataProviders/HarmonyDataProvider.ts
@@ -170,11 +170,23 @@ class HarmonyDataProvider {
     }
 
     public volumeUp = async (controlUnitName: string) => {
-
+        let volumeUpCommand: string = "Volume Up"
+        if (this.states[controlUnitName]) {
+            let volumeDevice: IDevice = this.getDeviceFromName(this.states[controlUnitName]!.currentActivity.volumeDeviceId);
+            if (volumeDevice.supportsCommand(volumeUpCommand)) {
+                this.sendCommand(volumeDevice.getCommand(volumeUpCommand));
+            }
+        }
     }
 
     public volumeDown = async (controlUnitName: string) => {
-
+        let volumeDownCommand: string = "Volume Down"
+        if (this.states[controlUnitName]) {
+            let volumeDevice: IDevice = this.getDeviceFromName(this.states[controlUnitName]!.currentActivity.volumeDeviceId);
+            if (volumeDevice.supportsCommand(volumeDownCommand)) {
+                this.sendCommand(volumeDevice.getCommand(volumeDownCommand));
+            }
+        }
     }
 
     public sendKeyPress = async (controlUnitName: string) => {