From the Manufacturer Be heard loud and clear with the PMP40. Click here for a larger image Switch easily between talk, siren, and on/off. Comes with detachable microphone Professional Megaphone / Bullhorn w/Siren and Handheld Mic Be heard up to 1000 feet away with this super-powerful, professional megaphone. Amplify your voice cord-free and with clarity with this lightweight device. This megaphone also includes a siren sound and handheld microphone. 2 Modes: Talk And Siren In addition to standard talk mode, the PMP40 features a built-in siren so you can get everyone’s attention fast. Variable Volume Control Adjust the volume to your preference with the variable volume control. Product Description Pro Model : PMP40 Megaphone with Plug-in Handheld Mic Megaphone Speaker, Amazon.com Pyle Model: PMP40 Megaphone Speaker Audio PA System with Wired Plug-in Handheld Microphone, Siren Alarm Mode, Adjustable Volume Control, Battery Operated Features: Portable and Powerful Megaphone Includes Wired Plug-in Handheld Microphone (2) Audio Projection Modes: Voice Talking & Siren Alert Voice Mode: Amplifies Your Voice as Spoken into the Mic Siren Alert Mode: Amplifies an Emergency Tone Through the Megaphone Speaker Adjustable Volume Control Ergonomic Pistol Grip and Light-Weight Chassis Battery Operated, Requires: (6) x 'D' Batteries, Not Included Trusted & Used by U.S. Armed Forces For Indoor/Outdoor Use Technical Specs: Power Output: 40 Watt MAX Audio Projection Range: 1,000’+ ft. Megaphone Size: Diameter 8.0'' x Length 13.12'' Weight: 3.48 lbs. The Pyle PMP40 Megaphone Speaker provides portable and powerful audio projection ability! With each iteration of flagship megaphones, Pyle has improved the battery life, sound power and ergonomic functionality. Control crowds from distances of up to 1,000’+ feet with handheld wireless performance. Additional system features include button-activated siren alarm mode, adjustable volume control, along with an included detachable wired microphone for convenient voice talking projection -- and it’s all housed in a battery operated design (requires (6) x ‘D’ batteries, not included). Enjoy portable and powerful PA speaker control with the Pyle Megaphone Speaker.