Let your voice or tunes ring out and be heard in 400 crystal clear watts - anywhere! This Technical Pro portable PA system is powered by a rechargeable battery with up to 8 hours operation or AC current so you can use in auditoriums, churches, outdoor theaters, at the beach & more! It has a quality 6-1/2" woofer, 1" voice coil & 1" compression driver so it's not only powerful, it sounds great too. Features USB port, SD card slot that supports up to 8GB cards, 1/8" AUX jack for connecting portable audio devices, RCA jacks, treble/bass/echo controls, perforated steel grill, wireless mic with 50' range & more. It plays musics from flash drives, SD cards & audio portable devices too! 10.75"x7"x11.25". 1-year limited warranty.