the t.racks DBMeter, DB Meter, For rack mounting, Measures the decibel level of the sum signal, Produces interesting lighting in your amplifier rack, LED indicator changes from green to yellow, Sensitivity adjustment for right and left channel, 2 Separate LED modes: dot and bar, Demo mode for activating the LED without audio signal, High level inputs: RCA jacks left / right and XLR jacks left / right for balanced signal transmission, High level outputs: RCA jacks left / right and XLR jacks left / right for balanced signal transmission, Power consumption: 10 W, Dimensions (L x W x H): 483 x 44.5 x 44.5 mm, Weight: 0.85 kg, Includes power supply unit 12 V DC 500 mA