Amazon Echo Dot (4th Gen) Smart speaker with clock and Alexa Glacier White B07XJ8C8F7 - Best Buy
Amazon.com: Made For Amazon, Battery Base in Black, for Echo (4th generation). Not compatible with previous generations of Echo or Echo Dot (1st Gen, 2nd Gen, or 3rd Gen). : Everything Else
Amazon Official Site: All-new Echo Dot (4th Gen) | Smart speaker with Alexa | Charcoal