DINY Home & Style Megaphone Compact Portable with Siren Alarm Sporting Events Picnics Parties Referee Megaphones Bullhorn Compact Portable Dynamic Volume Control Built in Siren Variable Volume Control Convenient Carry Strap LED Indicator,Power On/Off switch Folding Ergonomic Handle for easy storage, measures 8 7/8 inches x 6 3/4 inches Indoor/Outdoor Ideal for Sporting Events, picnics, Parties range of apx 1/4 of a mile Uses 4 C Batteries(Not Included) Alkaline batteries recommended for longer lasting use