Apex MEGAUSB MegaphoneThe newly designed MegaUSB megaphone takes away the worry of having a number of alkaline batteries on the ready for your event. The rechargeable Lithium Ion battery provides hours of power on a single charge using almost any USB power source. The detachable walkie talkie makes announcements more convenient, and the horn siren option will definitely grab everyone's attention. A handy carry strap is also included. Compact size, clear louder sound