Audio Format: Balanced Analog Signal Connecting wire: balanced audio cable (XLR signal cable) Scope of application: 1. Switch between signal sources such as CD players, digital broadcasting, set-top boxes, radios, decoders, etc. and power amplifiers (or active speakers); 2. Switch between the front and rear of the power amplifier. Name:XLR interface signal source switcher Name:Two-channel audio signal switcher (lossless switching) Type:3 In 1 Out Colour:Black Material:Aluminum Alloy Size:170x100x78mm Package Contents: 1 * HIFI audio signal selector 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.