Alexa hands-free mode is available on Fire 7 and 8 HD tablets

If you own an Amazon Fire 7 or Fire 8 HD (2017) tablet, then you're in luck because your device just gained a new feature. If your device is connected to power and/or the screen is in use, you can use the device for smart home voice control thanks to Alexa. The software update that will enable the hands-free Alexa feature is currently rolling out to devices. If you have a PIN or password set on the device, you must unlock it to enable all Alexa hands-free features. You can also opt to disable all of these features (or control whether it works while the device is password locked) in the Alexa settings menu.