diff --git a/demos/iOS-Demos/PolarSDK-Exercise-Demo/PolarSDK-Exercise-Demo/ViewController.swift b/demos/iOS-Demos/PolarSDK-Exercise-Demo/PolarSDK-Exercise-Demo/ViewController.swift
index 26fb1809..95203344 100644
--- a/demos/iOS-Demos/PolarSDK-Exercise-Demo/PolarSDK-Exercise-Demo/ViewController.swift
+++ b/demos/iOS-Demos/PolarSDK-Exercise-Demo/PolarSDK-Exercise-Demo/ViewController.swift
@@ -9,7 +9,8 @@ class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSour
     PolarBleApiObserver,
     PolarBleApiPowerStateObserver,
     PolarBleApiDeviceInfoObserver,
-PolarBleApiDeviceFeaturesObserver {
+    PolarBleApiDeviceFeaturesObserver {
+    
     
     var api: PolarBleApi!
     var deviceId: String?
@@ -148,8 +149,7 @@ PolarBleApiDeviceFeaturesObserver {
         NSLog("Battery level \(identifier): \(batteryLevel) ")
     }
     
-    func fwVersionReceived(_ identifier: String, fwVersion: String) {
-        NSLog("Firmware version \(identifier): \(fwVersion) ")
+    func disInformationReceived(_ identifier: String, uuid: CBUUID, value: String) {
+        NSLog("DIS info \(identifier): \(uuid.uuidString) : \(value)")
     }
 }
-
diff --git a/examples/example-ios/polarBleSdkTestApp/ViewController.swift b/examples/example-ios/polarBleSdkTestApp/ViewController.swift
index 356bf4ff..b502be18 100644
--- a/examples/example-ios/polarBleSdkTestApp/ViewController.swift
+++ b/examples/example-ios/polarBleSdkTestApp/ViewController.swift
@@ -2,6 +2,7 @@
 import UIKit
 import PolarBleSdk
 import RxSwift
+import CoreBluetooth
 
 class ViewController: UIViewController,
                       PolarBleApiObserver,
@@ -10,6 +11,7 @@ class ViewController: UIViewController,
                       PolarBleApiDeviceInfoObserver,
                       PolarBleApiDeviceFeaturesObserver,
                       PolarBleApiLogger {
+   
     // NOTICE this example utilizes all available features
     var api = PolarBleApiDefaultImpl.polarImplementation(DispatchQueue.main, features: Features.allFeatures.rawValue)
     var broadcast: Disposable?
@@ -281,8 +283,8 @@ class ViewController: UIViewController,
         NSLog("battery level updated: \(batteryLevel)")
     }
     
-    func fwVersionReceived(_ identifier: String, fwVersion: String) {
-        NSLog("fw version updated: \(fwVersion)")
+    func disInformationReceived(_ identifier: String, uuid: CBUUID, value: String) {
+        NSLog("dis info: \(uuid.uuidString) value: \(value)")
     }
     
     // PolarBleApiDeviceHrObserver