All devices with Bluetooth and Wi-Fi capabilities need FCC certification before selling in the US market.
The Apple HomePod was expected to be launched in December but the company postponed the launch to 'early 2018'.
Apple said, "We need a little more time before it’s ready for our customers", when asked about the delay in launching HomePod.
The company had announced that the device will be first shipped in US, UK and Australia in early 2018. The smart speaker was introduced in June 2017 and comes with capabilities to act as a virtual assistant, make music suggestions, adjust home temperatures and much more.
It is expected to be priced around $349. It is 6.8-inch tall and 5.6-inch wide and will weight 2.5 kg.
Apple HomePod is will be available in White and Space Gray colour options.