Electronic Features: Package Included: 1.Headset microphone 2.Battery charger 3.Mp3(audio) cable(male to male) 4.Adjustable waist belt 5.Carry bag 6.Quality warranty card Function: 1.Portable waistband voice amplifier 2.Mp3/iphone/ipad audio amplifier 3.Usb disk/TF card audio player 4.FM radio 5.Echo control 6.Wireless remote control Adaptable usage: 1.For teaching use(indoor) voice amplifier 2.For tour guiders(outdoor) voice amplifier 3.Public address,promotion waistband voice amplifier 4.Mp3,iphone,ipad audio loud speaker 5.USB disk/TF card audio player(amplifier) 6.FM radio 7.Wireless remote control Advantage: 1.Excellent soud effect,Echo control adjustable 2.Huge battery capacity,last working more than 15 hours 3.Muti functional audio player,FM radio,Self ktv function 4.Wireless remote control,easy operation when you enjoy the audio player Package Included: 1.Headset microphone 2.Battery charger 3.Mp3(audio) cable(male to male) 4.Adju ol