Police light with electric horn/siren. Looks like a real thing! Four switches control 4-tone of police whistle. Another switch controls the flash modes of the police light. Light and control attach to handlebar with included hardware. Requires 2 AA batteries - non-included. Dimensions: 4.41 in x 2.13 in x 2.36 in. Different Flashing and Steady Light Combinations . Hi-Vis RedPleasure for the child of any age! Kids can Pretend to be heros on their bicycles. Just turn on the lights and sounds and run to be a hero....Attaches easily to any bicycle. on and off switch ito turn power on or off. 2 AA batteries not included. For outdoor use only.