Pocket-Lint says it discovered this image of the new Amazon “Echo Sub” on the e-commerce giant’s UK site.

Images and descriptions of two unannounced Amazon Alexa devices publicly surfaced Wednesday afternoon, providing an inadvertent sneak preview of what was previously reported to be a new wave of smart home devices from the Seattle-based tech giant.

The devices, discovered by the tech site Pocket-lint on Amazon’s UK site, include a new Alexa-powered “Echo Sub” subwoofer that can be used with an Echo or Echo Plus to play room-filling music, or paired with other Echo devices for “rich left/right stereo sound,” according to the description.

In addition, there is a new Amazon Smart Plug that adds voice controls and scheduled on/off functionality to electrical sockets. Although many third-party device makers offer Alexa-enabled smart plugs, the description for this device says it works without a smart home hub, via the Alexa app. Existing plugs are commonly used in conjunction with an Echo speaker or other Alexa device.

CNBC reported earlier this week that Amazon is preparing to release eight new Alexa-powered devices, including a microwave, amplifier and an in-car Alexa device.

We discussed the CNBC report on this week’s episode of our Geared Up podcast, below.

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