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It depends what you're using it for. One works by itself, and they come with power cords.
Sorry, there was a problem. Please try again later.Hi Judy, The great thing about the Echo devices with Alexa built in is there are endless amounts of devices that can be added. It would really depend on what devices you prefer. The Echo Dot is a great device for a smaller room, the Echo has two speakers built in and will give you a great quality sound (if you want to use it for music). The Smart Plug is a great add on for devices that you would like to have the ability to turn on and off with your voice such as a lamp. You can use the Echo devices simultaneously to listen to multi room music, or make phone calls on. The possibilities are endless! Have a great day!
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