Explorer Pro Sound System w/ Single Built-in Wireless - Explorer Pro is a light weight system that delivers a great balance of speech clarity and music fidelity making it a favorite of the audio rental companies and hotels for a quick set-up in a conference room. FEATURES: UHF Wireless Receiver w/ 16 User Selectable Channels, True AC/DC - 110/220V Power Supply, Operates from 12V Power Source (such as automobile power port), LED displays for Battery Level & Charge Condition, High-Efficiency Amplifier & Full-Range Speaker System Deliver High Fidelity Sound, Voice Over, Music Ducking Feature, Two Universal Input Jacks, 110 dB @ 1 meter, 1/4in Line Input and RCA Line Input, RCA Line level Output, Bass and Treble Controls and Unswitched 8 Ohm Speaker Output.