The PowerPro PA920 is Califone's flagship PA system designed for audiences of 1,000 or more. The PA920 is flexible, easy to use and cost-effective for those who require a high-performance sound reinforcement solution but wish to avoid the effort necessary to operate a typical multi-component sound system. Designed for school venues ranging from auditoriums to assemblies, athletic events and other large groups, the PA920 provides wireless transmission to any number of its powered companion speakers, providing expandability to handle virtually any situation. The PA920 is a complete, self-contained sound system with two built-in wireless mic receivers, a CD/USB Media Player and Bluetooth compatibility that allows wireless connection to Bluetooth-capable mobile devices. It features 90-watts RMS of power, with a single unit easily covering crowds up to 1,000 people or many more with added wireless PowerPro companion speakers. In addition to the 300' range of wireless transmission to an unlimited number of powered companion speakers, the PowerPro also has an active bus circuit that can be used to connect an additional unit in a conventional wired fashion. Simply connect an XLR cord from the Line out jack to the Line in jack on the companion speakers. The first unit in the chain is the master with each unit still retaining independent volume control. The PA920 master speaker has two combination XLR / 1/4" jacks for use with wired mics and also includes a set of stereo RCA jacks that are ideal for connecting external audio sources. Its fiberglass-reinforced polypropylene enclosure has a rugged powdercoated perforated steel grille and telescoping handle for easy transporting. The PA920 gives added assurances with visual confirmation of power, radio frequency and audio reception for each of its two wireless receivers through a set of LED lights on each receiver. Its 10" high-powered speaker provides optimal audio reproduction with independent bass and treble controls, digital master volume control and battery status indicators plus a universal power supply. It is C-UL and CE approved for use in schools. Powerful 90 Watts RMS with weather-resistant speaker cones Dual 16-channel UHF selectability for two wireless mics. Red display, blue and amber LED lights for each wireless mic receiver for visual confirmation of power, wireless reception and audio signal. 16-channel UHF transmitter for wireless transmission to companion speakers (companion speakers not included) Bluetooth capability for wireless playback from Bluetooth compatible mobile devices. Separate volume, bass, treble controls for quality sound 2 combo XLR/1/4" mic inputs, each with volume control Aux in & Line inputs to connect with other media players. Voice Priority Master volume and Battery status LED indicators Wireless mono/stereo selectable link out Two rechargeable batteries 12V/7 AH Battery ON/OFF switch Switched/un-switched Speaker Out True AC/DC 110/220 universal power supply Rugged steel skid guards for protection & durability 4-position steel handle for easy mobility CE/UL compliant for safe use in schools, churches & public facilities Includes CD remote control & Master remote with volume and mute.