The KTMPH75UBLBAT is a high-powered megaphone great for any occasion. For convenience, it features a wired microphone that can be attached to the back of the KTMPH75UBLBAT and activated via the trigger controls or detached and activated via integrated controls on the microphone itself. The KTMPH75UBLBAT also comes with a built-in siren and internal memory that allows you to record messages and play them on a loop. All of this is backed up by the MPH75U's high peak power output of 75 watts which helps cover larger areas. In addition to its microphone, the KTMPH75UBLBAT also sports USB, SD, and AUX inputs that allow you to play recorded messages and even music from smartphones, music storage devices, and more. For extended playback time, the KTMPH75UBLBAT operates on 8 C batteries or the rechargeable Battery that gives you hours of use.