User Manual Harman Kardon Onyx Black Wireless Speaker System

This speaker can play through bluetooth or it has a 3.5mm aux port to connect to most sources that don't have bluetooth

Yes. This can be done using the HK Remote App that can be downloaded through the Google Play Store or the iOS App Store. The ONYX is DLNA compatible, meaning you can connect it to your home network and stream your audio through that. The Remote App allows you to control which speakers to play and has its own built-in playlist.

Yes, it can. It's a bluetooth speaker, so it can connect to any Bluetooth device.

I assume you mean how do you pair these 2 speakers together? If so the answer is you can't pair this speaker with the onyx studio 3

Our HK Onyx Studio 6 should be able to pair and connect with your Bluetooth devices like mobile phones, tablets, and laptops. You may need to check the specifications and settings of your Echo Dot via the Amazon Alexa App to successfully connect the speaker with it.