FixtureDisplays Portable Handheld Megaphone/Bullhorn Loud Speaker with Siren, 10 Seconds Voice Recorder 15959. This megaphone is powerful, compact and portable, offers 15 watt of power and an 220-yard voice range. Built-in microphone in rear of unit offers voice recording with ten-second integrated audio memory voice playback. Variable volume control, built-in siren, and rugged ABS housing. This FixtureDisplays Portable Handheld Megaphone Can be used by a wide range of groups from army training to camp management, or school yard drills. Powered by four R20 batteries (Not Included). Measures 9.4 w x 9.4 H x 6.0 D, weight is 1.8 lbs/800g. Color is yellow and grey. For your convenience here is a link to assembly video: https://youtu.be/rtsd105hVEQ. You can also search "15959 Amplifier Instructions" on youtube to locate the video. You can also download video by following this link: http://www.fixturedisplays.com/video/15959.AVI