This smart duo combines the ultimate decorative smart LED lights for both vibrant décor and sleek accent lighting. Strings 400 LEDs have a classic design for any indoor or outdoor setting. Dots features 60 mini-LEDs and a sleek format for lining furniture and objects or creating custom wall art. The Twinkly app uses your smartphone camera to map LEDs into screen-like displays. Play and customize preset effects or create your own from scratch to match every mood. Virtually connect lights to act as one single display or to play effects in sync via the Twinkly App. Dots 60 LED are USB-C powered and for indoor use only.