Hello & Welcome to Just Answer,
Sorry to hear of any issue you may be having in selecting a device.
To help you with this issue, may I ask:
1) When you say "voice activation" - what exactly does that mean?
For example, do you want to SPEAK TO the device, and have it respond to your "commands", or are you looking for something else?
I see it has been a few days and I haven't seen a response on this page, so I just wanted to follow up to see if you have any more questions concerning this issue OR if the issue was resolved?
Also, I have attached a screenshot of a current Garmin page showing how you can "Shop by Feature" - to filter the displayed units ("Voice-activated" was used for this one).
You might also want to use a "search" at places like Amazon, for the phrase "Garmin Voice Activated GPS" (without the quotes), so show some possible devices that might work for you. As an example, I have a link to a search I did for that phrase below (on Amazon).
Click Here for Search Results --> http://amzn.to/2eaXvpu
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)