Bluetooth speaker: built-in Bluetooth speaker connect a smartphone or tablet via Bluetooth to enjoy the music. The starlight projector will change with the beat of the music. Multiple modes: the combination of aurora borealis moon and stars can be played alone or in combination. The flowing aurora hole effect creates a relaxing environment. Remote control: the projector with remote control can control on/off of the aurora moon and stars adjust brightness change lighting mode music mode and volume. Synchronization function: easy to remotely set a personalized operating time (1 hour/2 hours) via app and remote control to help people fall asleep quickly. Ideal gift: the projection lamp is suitable for a birthday party a wedding bedroom decoration children's party Christmas and anniversary. The starry sky projection lights create a wonderful starry-sky atmosphere, helping to stimulate children's curiosity, imagination and creativity. It's also ideal as a starry sky projector, romantic mood lamp, nightlight or bedside lamp for interior decoration.