Features: 1) 863MHz Stereo Wireless Speaker System 2) Frequency: 863 - 865MHz 3) PLL (Phase Lock Loop) Technology 4) Operating Range: 100 meters (open field) Speakers: 1) Auto Scanning 2) Bass/Boost selectable 3) Mono/Left/Right channel selectable 4) 2-ways System 5) Magnetic Shielded Speakers 6) Operated by 6 x AA batteries (not included) or 2 x 12V Power Adapter(included) Transmitter: 1) Auto ON/OFF, 2 channels selectable 2) Auto Level Control 3) Flexible antenna 4) Audio cable; RCA cable; 3.5 mm to 6.3 mm adapter plug provided 5) 1 x 12.5V Power Adapter Specifications: 1) S/N Ratio: 50dB 2) Distortion: < 2% 3) Frequency Response: 40Hz -12 KHz 4) Channel Separation: 30dB 5) Output Power: 3.5W RMS