Unizone UZ-9088EMS Portable Rechargeable Voice Amplifier Public Address (PA) USB Speaker - Black Max 20W Loud, Clear and Natural Sound Recording and FM Radio Functionality USB, MicroSD Card Slot and Aux Audio Input Connectivity Compact (4.2x3.5x1.3 inch) and Light-weight (0.46 lb) Up to 8 Hours of Usage per Charge