The Good: Nanoleaf's music-syncing Rhythm module is incredibly easy to use, and it works well with a wide variety of music. You can trigger rhythm presets using voice commands with Siri, Alexa or the Google Assistant. The Bad: The tool for creating your own presets is very basic, only letting you pick a color palette and a single animation style. The Bottom Line: This is a no-brainer upgrade if you already own a set of color-changing Aurora panels, and a fun excuse to buy in if you're a tech-minded music lover. Nanoleaf's triangular, color-changing Aurora light panels charmed us last year when we tested them in the CNET Smart Home. This year, Nanoleaf released an upgrade for those panels -- the Nanoleaf Rhythm music sync module. Plug it into your panels, and you'll be able to use its built-in microphone to sync colorful lighting changes to the beat of whatever music you're listening to. The cost: $50 on its own, or $230 if you buy it bundled with a nine-panel Aurora starter kit. (Nanoleaf ships internationally -- those prices come out to about \u00a340\/AU$65 and \u00a3170\/AU$305, converted roughly.) \t \t \tInstalling the Rhythm module is about as easy as it gets. Just plug it directly into any of the open connector slots on the sides of your Aurora panels, then wait a few seconds. After that, you'll be able to pick from a variety of rhythm-based presets in Nanoleaf's app for Android and iOS devices, and you'll also be able to trigger those presets using voice commands with Alexa, Siri or the Google Assistant. Like the panels themselves, the Nanoleaf Rhythm is niche novelty for the smart home that isn't for everybody. But if you've already found a place in your home for those Aurora panels (or if you'd like to), then the Rhythm module will give them some undeniably nifty new tricks. That makes it a no-brainer upgrade for anyone who's already invested in Aurora, and a reasonable justification for tech-minded music lovers to consider buying in. The Rhythm module uses its built-in mic to listen for ambient noise (there's also a 3.5mm aux-in jack on the side if you want to pipe in audio directly). From there, Nanoleaf's software will translate everything the module hears into lighting changes based on the specific preset you've chosen. In my tests, it worked best when the music was coming from a nearby speaker, but it'll work if the music's coming from across the room, too, provided you've got it turned up loud enough. Some presets will yield bursts of color with every beat, while others will make your display into a makeshift level meter that pulses in rhythm with whatever's playing. Some presets are subtle, some are ostentatious. All of them seemed snappy and responsive in my tests.