Keep your birthday boy or girl drinking with this birthday button. Pressing a tab on the back of the button lets everyone (including the bartender) know whose birthday it is. The red light flashes and the button plays a noticeably loud Happy Birthday tune. Scoring free drinks for your birthday boy or girl has never been easier! ****Features:*** Flashing Musical Birthday Button - Age 21*** Push Button On Back To Activate*** Batteries Included*** Flashing Light And Plays *Happy Birthday*****Dimensions:*** Flashing Musical Birthday Button - Age 21 - 2 1/2* Diameter