GooDee Rechargeable Voice Amplifier Portable Waistband Pa System Microphone with Waist/Neck Band & Belt Clip Up to 15~20 Hours Playtime [VERY LOUD & EXCELLENT CLARITY]: Sound covers over 3,500 square feet. Can also be used MP3 speaker. The AMP has a microphone input and a MP3 input . The AMP will accept signals from both input ports and out through the speaker at the same time. LOW feedback. [VERY EASY TO USE & PROTECT YOUR THROAT]: Super Long Play Time, Rechargeable Lithium Batteries that last 10~15 hours of continuous use before needing a charge. Battery lifespan will last 2~3 years. [PORTABLE DESIGN]: Super Powerful Voice Amplifiers/Speakers. Size is 4.13 inch x 3.31 inch x 1.38 inch (105mm x 84mm x 35mm). Very Easy to carry, suitable for Presentations, Instructors, Gym Directors, Seniors, Tour Guides etc. [PACKAGE INCLUDES]: Comes with Headset Microphone, Charger Cable (US plug), MP3 Cable (male to male 3.5mm), MP3 Line in Port, Microphone Line in Port, Removable Belt Clip, Adjustable Waist Band and Carry Bag [FULL GOODEE WARRANTY]: 12 Months GooDee Warranty, 2 Month Hassle-free Return. Premium Customer Service and Lifetime Support. GooDee Voice Amplifier are all inspected before ship out, but if there still have problems, please feel free to contact us for a better solution.