The UZI-MP-PRO 50-Watt Megaphone with Siren features adjustable volume and recording/playback. This model also features a detachable microphone, repeat play back, shoulder strap, siren and LED indicator. USB, SD Card & AUX jack for recording playback. The 50-Watt Megaphone offers a range of approx. 500M. This model comes with rechargeable battery but also accept (8) C batteries. UZI combines advanced technical concepts with innovative designs to produce products used and trusted by the Army, Secret Service, and Special Forces - & : The UZI-MP-PRO 50-Watt Megaphone with Siren offers a range of approx. 500m (1,600 ft), works as an airhorn - : Ideal for Football, Baseball, Hockey, Cheerleading Fans & Coaches, Referees, Safety Drills, Camping, Boating, schools, Siren for safety calls and getting everybodys attention - /: The megaphone features adjustable volume control and a recording/playback function with internal memory that can record up to 16 seconds of audio. - & : Rechargeable Battery included with Foldable Prongs to plug into the outlet to charge; also accepts 8 C batteries (not included) - The weight of the megaphone increases when (8) C batteries are used instead of the rechargeable battery. - - & : The megaphone has a USB, SD Card, and AUX jack for playback, and it is compatible with 110V. It also comes with a 1-year warranty for your peace of mind.