20dB balanced Xlr attenuator. Power supply type: Electric wire Item Package Dimensions: 11.94L x 4.83W x 1.27H cm In-Line Balanced XLR Attenuator - 20dB Ideal for all types of prosound interface applications, this device connects in-line with the line level signal and provides fixed 10dB attenuation. Male - female connections Nickel plated contacts 4" length Fully pivotal 1" mylar dome tweeter