Flashing Treble Clef, (9 LEDs, 7 red, 2 white). Batteries are included. Packed in groups of 1 dozen pieces. Please Note: We are moving away from Magnetic connectors to either Clip-On or Butterfly connectors. This product has a Butterfly connector. A Butterfly connector may create a small hole in the garment you attach it to. Please order in increments of 1 dozen.