Watch lights dance to any song with Twinkly Music, USB-powered sound sensor. It features a highly accurate BPM counter and a smart microphone that listens to and interprets ambient sounds in your space, syncing your Twinkly smart LED lights to any recorded or live music or sounds played in the vicinity. 
No need to keep the app open once your lights are set up, as Twinkly Music runs independently of the app. For indoor use only. Works exclusively with Twinkly lights (sold separately).