Portable 50W Megaphone Handheld Security Guard TF USB Loud Speaker Travel Guide Speech Teach Voice Amplifier ,High Sound

50W high power 1000m propagation distance Multifunctional USB card to insert U disk 1500mAh lar capacity lithium battery AUX interface supports multiple audio playback 3 power supply methods, more convenient for outdoor useYou may also like Wired Mini Megaphone Portable Voice Amplifier For Tour Guide Meeting Teaching Sales Microphone LED TF Card Booster Loudspeaker ,High Sound.