Usage Tips:Portable Megaphone Bullhorn Megaphone Speaker And Siren/alarm ModesLoud and powerful - No more straining your voice to be heard over the noise. This 25-watt amplifier allows you to hear yourself up to 500 meters away.Amplify your voice clearly. Portable - With a lightweight design, foldable handle and convenient carrying strap, this 5.5 wide speaker is easy to pack and is designed for outdoor use. Recording with Voice - Record/playback option gets your attention when needed.The record and playback audio feature will keep your voice on command and they're sure to hear your message over and over again. Creative Design - Surprisingly added safety bottle opener design.PERFECT FOR EVENTS - Our amplifiers are perfect for sporting events, lifeguards, event organizers, law enforcement, rescue teams and more. It will attract attention on boats, during school assemblies, community fairs and conferences. Size 22.5*18.5*13.8CM