50 Watt multimedia stereo amplifier reaches up to 1,000 people outdoors or in rooms up to 10,000 square feet.Stream audio from any Bluetooth equipped smartphone or tablet.Includes built-in 16-channel UHF wireless receiver lapel and headset microphones with wireless transmitter bodypack.Three microphone inputs (dynamic, condenser, wireless).Connect to other audio devices for enhanced playback or recording.Weatherproof and scuff-resistant molded black luggage-type plastic case holds up to abuse and protects amplifier.Case contains sturdy foam shell for storing microphone and accessories.Runs up to 200 hours with ten D-cell alkaline batteries (not included), or use the optional rechargeable AmpliVox S1465 NiCad battery pack with S1460 AC adapter/recharger.Dual wireless capability: two presenters can be wireless (with second optional wireless mic kit - sold separately).