From Google:
"What does this warranty cover and how long does it last? Google warrants that a new Google Home device (including any ancillary parts that may be packaged with it) will be free from defects in materials and workmanship under normal use in accordance with Google’s published user documentation for one year from the date of original retail purchase in its original packaging by you. If a Google Home has been refurbished, Google warrants that the Google Home (including any ancillary parts that may be packaged with it) will be free from defects in materials and workmanship under normal use in accordance with Google's published user documentation for ninety days from the original date of retail purchase by you (these warranties are collectively referred to as our “Limited Warranty”)."