https://www.techradar.com/news/amazon-is-morphing-your-fire-hd-tablets-into-echo-show-smart-speakers

In advance of Prime Day, Amazon has discounted the Echo Show smart speaker to a all-time-low $160 (about £122 / AU$220). But, if that still sounds too high, just turn your Amazon tablet into a speaker instead. 

Back in April, Amazon updated its tablets to respond to Alexa voice commands. In Hands-Free mode, 4th, 5th, 6th, and 7th generation Fire tablets can respond to the same queries you’d normally ask your Echo speakers.