Hisonic HS128MP3 Lithium Rechargeable Battery Wireless Portable PA System with USB & SD Port MP3 Player with Car Cigarette Lighter Cable (HS120B+MP3 Player) Portable PA with 50 watts maximum output power & wireless microphones Built-in High Capacity Lithium rechargeable & replaceable high-capacity battery, ideal for outdoor activities Aux input + additional 3.5mm & 6.5mm microphone inputs Excellent portability with compact size & light weight 1-year manufacturer's warranty