Atrium Series Speakers exceed baseline industrial and military specifications for environmental endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std 883 Method 1009.8 for salt and corrosion.) Anodized Aluminum Tweeter Domes with Rubber Surrounds are absolutely immune to the elements, provide the smooth, broad high-end range you need for larger outdoor spaces Newly designed tweeter phase cap smoothes the frequency response from 12KHz up to 20kHz, the last audible octave.

★ WIRELESS CONNECTION & OPERATION: Instantly pair with iPhone,iPod, iPad, android devices, etc with line of sight of up to 66 feet. You can also use the remote control to switch mode, play/pause, switch to previous/next song, increase/decrease volume from up to 20 feet; Telescoping speaker pole to adjust the pa system from 65 inch to 80 inch. Use side handles to lift and transport the subwoofers conveniently. ★HUGE COMPATABILITY & VERSATILE CONNECTIONS: The powered system set features BLUETOOTH/USB DRIVE/SD CARD functions. Simply insert USB drive/SD CARD to playback songs. Versatile 4-channel mono & stereo inputs (two mono XLR inputs for microphone or line-level source, one stereo 6.35mm input and one stereo RCA input) and one stereo RCA outputs. Individual volume controls and treble/bass control, master volume to set the general volume conveniently ★ WIDE RANGE OF USAGE:The PA system has 3000 Watt Peak /750 RMS, and can accommodate up to 500 persons and 300 m2. Wide frequency response (from 40-20KHz) makes it suitable for amplifying any type of audio including music or vocals. Great for wedding, meeting, speeches, churches, class teaching, gymnastics, conference, home theater, etc. Easily connect to multiple musical instruments.