diff --git a/src/Device.js b/src/Device.js
index 23154c6..36060cb 100644
--- a/src/Device.js
+++ b/src/Device.js
@@ -81,6 +81,30 @@ class Device extends EventEmitter {
     return this.helper.prop('Connected')
   }
 
+  /**
+   * Service advertisement data. Keys are the UUIDs in string format followed by its byte array value.
+   * @returns {object}
+   */
+  async getServiceAdvertisementData () {
+    return this.helper.prop('ServiceData')
+  }
+
+  /**
+   * Manufacturer specific advertisement data. Keys are 16 bits Manufacturer ID followed by its byte array value.
+   * @returns {object}
+   */
+  async getManufacturerAdvertisementData () {
+    return this.helper.prop('ManufacturerData')
+  }
+
+  /**
+   * List of 128-bit UUIDs that represents the available remote services.
+   * @returns {string[]}
+   */
+  async getServiceUUIDs () {
+    return this.helper.prop('UUIDs')
+  }
+
   /**
    * This method will connect to the remote device
    */
@@ -103,9 +127,10 @@ class Device extends EventEmitter {
       if ('Connected' in propertiesChanged) {
         const { value } = propertiesChanged.Connected
         if (value) {
-          this.emit('connect', { connected: true })
+          this.emit('connect', { connected: true, deviceUuid: this.device })
         } else {
-          this.emit('disconnect', { connected: false })
+          this.emit('disconnect', { connected: false, deviceUuid: this.device })
+          this.helper.removeAllListeners('PropertiesChanged') // might be improved
         }
       }
     }
@@ -119,7 +144,6 @@ class Device extends EventEmitter {
    */
   async disconnect () {
     await this.helper.callMethod('Disconnect')
-    this.helper.removeListeners()
   }
 
   /**
@@ -150,6 +174,7 @@ class Device extends EventEmitter {
    * @event Device#connect
    * @type {object}
    * @property {boolean} connected - Indicates current connection status.
+   * @property {string} deviceUuid - The UUID of the device freshly connected
   */
 
 /**
@@ -158,6 +183,7 @@ class Device extends EventEmitter {
    * @event Device#disconnect
    * @type {object}
    * @property {boolean} connected - Indicates current connection status.
+   * @property {string} deviceUuid - The UUID of the device freshly disconnected
   */
 
 module.exports = Device
diff --git a/src/GattCharacteristic.js b/src/GattCharacteristic.js
index db0cd44..ed49ad6 100644
--- a/src/GattCharacteristic.js
+++ b/src/GattCharacteristic.js
@@ -105,8 +105,6 @@ class GattCharacteristic extends EventEmitter {
    * It emits valuechanged event when receives a notification.
    */
   async startNotifications () {
-    await this.helper.callMethod('StartNotify')
-
     const cb = (propertiesChanged) => {
       if ('Value' in propertiesChanged) {
         const { value } = propertiesChanged.Value
@@ -115,6 +113,10 @@ class GattCharacteristic extends EventEmitter {
     }
 
     this.helper.on('PropertiesChanged', cb)
+
+    // Call StartNotify after the listener is attached in order not to lose
+    // the first notifications of the device.
+    await this.helper.callMethod('StartNotify')
   }
 
   async stopNotifications () {