It needs constant power from your car and connection to your phone for alexa app and data. iPhone or Android with Alexa app open (foreground or background) and Bluetooth connected. Echo Auto 2 with Adhesive Mount and Car Vent Mount B0BFCJF66B.
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s 2nd-Gen Echo Auto Is Down to $40 Right Now - CNET
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Echo Auto- Hands-free Alexa in your car with your phone – Totality Solutions Inc.