It’s surprisingly easy to add multiple Alexa devices to a single Amazon account. The Amazon Alexa app for iOS and Android walks you through the process. If you sync control ofto one Echo unit, any other Echo products tied to the same account will also recognize them.
Thanks to an audio line-in on the Tap and the magic of Bluetooth, you can link the Tap to the Dot either over a cable or wirelessly. This combination gets you the better speakers and the portability of the Tap with the always-listening Alexa feature via the Dot. Buying both the Dot and Tap will cost $220, $20 more than a single Echo, but it gives you a more flexible set up with portability when you need it — and always-on Alexa convenience when you don’t.