https://www.theverge.com/good-deals/2018/10/12/17967508/amazon-free-echo-dot-xbox-one-console-deal

To mark the launch of new Alexa skills for Xbox One, Amazon will offer its updated Echo Dot for free with the purchase of an Xbox One S or Xbox One X console while supplies last. Normally a $49 purchase by itself, getting Amazon’s tiny speaker tossed in for free is a nice perk — regardless of whether you see yourself shouting Xbox voice commands regularly or not.