The Defender pepper spray can be linked to your Android or iOS device via Bluetooth. Geolocation to notify authorities of your current location will work as long as you're in the United States or Canada. I have not read any information on whether or not geolocation will work if it's turned off on your device or whether they plan to expand to other countries in the future. However, the device itself contains a speaker that alerts you when it's connected to your device and when it's not. Your smartphone must have a WiFi or data connection established for the device to notify authorities.
You can also send medical alerts to people of your choice from your device's contact list. When you send this type of alert, text and email notifications will be sent containing your personal description and specific medical issues.
The Defender is available now for pre-order on the official Defender website at getthedefender.com. The release date is estimated for Q1 of 2017.