Use indoors or out. Lightweight luggage type, becomes its own lectern.nbsp Retractable legs. 50 watt multimedia stereo amplifier Two Jensen designed 6148 x 8148nbspoval speakers one built into lectern, one in lid with 40146 cable professional dynamic cardioid mic with 15146 cable flexible gooseneck with shockmount mic holder. Dimensions 16 34148 x 17148 x 9148.Power SourceAll AmpliVox PA146s require POWER Talk for up to 200 hours on a single set of 10 D cell alkaline batteries not supplied. Or use thenbsp1033175 International AC AdapterRecharger to plug in virtually anywhere in the world. Use thenbsp1033182 NiCad Battery Pack with thenbsp1033175 for a rechargeable system. ALL SOLD SEPARATELY