Nanoleaf Canvas Light Squares Expansion Pack - 4 Pack NL29-0001SW-4PK | Expansion Only, Requires Canvas Smarter Pack to Function | Modular Light Squares | Music Visualiser | Reacts to Your Touch | Screen Mirror for Movies and Gaming | Layout Detection | Customise and Control via Nanoleaf App | Works with HomeKit, Google Assistant, Alexa, IFTTT, SmartThings | NL29-0001SW-4PK | 1 Year Warranty