The Pioneer DEH-80PRS CD Receiver with 3-Way Active Crossover Network, Auto EQ and Auto Time Alignment features exclusive sound technologies that help optimize audio in ways that perfectly suit particular listening spaces and allow subtle manual control of settings. Versatile connectivity helps deliver exceptional sound quality from various digital devices. The 3-Way Digital Network connects up to three external amplifiers, each dedicated to driving high-, mid- and low-frequency ranges, respectively. Time alignment automatically estimates the delay from each speaker to the driver"s position and adjusts speaker sound output timing so that sound from all speakers reaches the driver"s ears in perfect sync. Auto EQ tailors specific musical characteristics according to preference, uses a microphone to monitor and analyze acoustics, then automatically fine-tunes all frequency bandwidths and front and rear speaker digital parametric equalization.Package Content:cd receiverremote controlCR2025 lithium batterymanualwarrantyFull dot LCD display (191 x 48 pixels, 3 line)Built-in MOSFET 50W x 4 amplifier3 sets of Hi-Volt RCA preouts (5V) for system expansionDual 16-band graphic equalizerAdvanced Sound ReceiverHeight 2.00Width 7.00Depth 7.00Weight 3.43ColorOperating SystemBatteries IncludedBatteries RequiredNumber of Batteries 1Battery Type CR2025 lithium (included)Language EnglishAssembly Required