Amazon Echo Dot (2nd Gen) - Black (Refurbished Grade A) | Cult of Mac
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 Echo Dot (2nd Generation) review: New $50 Echo Dot: Adding Amazon's Alexa to your home just got a lot cheaper - CNET