Flashing Musical Note , 4 LEDs: ( 3 yellow , 1 white). Battery are included. Packed in groups of 1 dozen pieces. Please order in increments of 1 dozen. 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.