Perfect for announcements in colleges , schools, drills , offices , police , including siren noise You can record music, voice and play subsequently it has 240 seconds recording capacity Also, you can playback from USB or memory card recorded voice , announcement, parking lot directions ,speech ,anthems, music and so on USB Chargeable , cable provided. Battery can be recharged -recharge unit provided , 1 battery included 20 watts sound output suitable for large audience. Handle for grip with mini sling . Continuous repeat playback available. Has been utilized by indoor & outdoor fire officers, mentors, police, firefighters, cheerleader, schools, sports activities, occasion organizers and director megaphone want to utilize this minimal bullhorn for various reasons.