... Reverb /Echo function SPECIAL PRICE!!!Mini size waistband teaching tour guide speaker with multifunction V-3 *Mini size, ... speaker, high sensitivity microphone*Built MCU Intelligent recharging management system for secure recharge and discharge*Fully charged within 4 ... Audio cable x 1pc*Hanging belt x 1pc APPLICATIONS:Teaching, Tour guiding, Morning exercise, Training, Sports, Speech,Publication,Outdoor ...