Hisonic SH-227 Rechargeable Portable PA System with Built-in Lithium Battery, 100-channel UHF Wireless Microphone, Music Player with Voice Recorder, FM Radio, 65 Watts, Color Black, Remote Control Included Built-in rechargeable & replaceable high-capacity Lithium battery, ideal for outdoor activities Built-in UHF wireless microphone system with 100 selectable channels, additional microphone can be added though microphone input jack Powerful 65 watts speaker delivers loud and clear sound even in a noisy environment Fully featured music player and recorder with built-in USB port, card reader, line-in jack and FM radio Compact, fashionable and self-contained design, remote control included for added convenience