The all metal decibel display is great for monitoring your sound volume. Make sure your speakers stay in great shape by keeping those dBs under control through this monitoring system. The LED display progresses from green through amber, to red. There are two different operating modes: Dot or Bar. A 5V 500 mA power supply is included so you can get the unit plug in an running right away. The dB-DISPLAY is perfect a stage, church, club or bar install or for a mobile entertainer. Line Inputs: Left & Right RCA / Line Outputs: Left & Right RCA, Dimensions: (LxWxH): 19" x 1.75" x 1.75" / 44.5mm x 483mm x 44.5mm, Weight: 2.5 lbs. / 1.25kg.