Interface: plating RCA interface
supply: needn't additionally connect supply, able to be used once inserted
Input and output impedance: 10KΩ - 50KΩ
Frequency responding: 20 - 20kHz.
Distortion: Less than 0.002%

Output consumption: Less than 0.01dB
Signal gain: 0dB
Signal-noise ratio S/N: Greater than 98dB
Input and output interface: standard RCA interface
Volume control switch: adopt professional 128mm clipper volume switch
Material:Metal
colour:Black

Package Contents:
1 x volume controller

Only the above package content, other products are not included.
Note: and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.