Um.....
I have a pair of Echo Tap units, they must have been delivered via a wormhole from the future.
The tap originally required pushing a button to give commands (hence "tap") but a software update allows it to listen at the expense of battery life. It's a great product that was seemingly discontinued for no reason. It still is a second-class citizen in the alexa ecosystem as you cannot use it to communicate or send/receive an announcement.
Either way, your research team needs a kick in the ghoulies on this one.
https://www.amazon.com/Amazon-Tap-Portable-wireless-Bluetooth-Speaker-with-WiFi-Alexa/dp/B01BH83OOM