Input channel: supports four RCA/(2 sets of stereo) lotus head interface inputs Output channel: supports four-way RCA/(2 sets of stereo) lotus head interface output Isolation cattle: 4 professional isolation cattle are used to independently isolate 4 channels Frequency bandwidth: 20hz~20Khz Input and output interface: Input and output adopt gold-plated lotus head interface Isolation voltage: AC50HZ-60HZ 0V-1500v Output loss: Less than2db Input and output impedance: 600 ohms (AC impedance): 600 ohms (AC impedance) Power supply: no external power supply required, plug in and use directly size: 9 x 6 x 2.5cm Material: Aluminum alloy colour: Black Package Contents: 1 x audio isolator Only the above package content, other products are not included. Note: Light reflection 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.