Hisonic HS120BW-HL Lithium Battery Rechargeable & Portable PA (Public Address) System with Built-in VHF Wireless Microphone and Car Cigarette Lighter Cable Excellent portability with compact size & light weight Built-in rechargeable & replaceable high-capacity battery, ideal for outdoor activities Built-in VHF wireless microphone system with additional microphone input jack, powered by Lithium Battery and comes with a Car Cigarette lighter cable you can use a car battery to run the system Powerful 40 watts speaker delivers loud and clear sound even in a noisy environment One year manufacturer's warranty