1, two groups of XLR signal input, two groups of XLR signal output, a group of RCA connection input and output. 2, input and output using rotary 3-position independent mechanical switch switching, switch using high-precision silver-plated contacts non-loss switching. 3, switching operation rotary gear switch switching will not produce burst sound, the sound quality does not affect the loss-free mission. 4, easy to install: input and output with connecting line plug-and-play easy to install. Signal source mission without loss of switching, you can enjoy a different listening experience. 5, mainly used to choose to switch a variety of balanced stereo signal input to share the output of a set or multiple sets of equipment. Such as multiple stereo signal sources (preamplifiers, CD players, decoders, high-end players and other equipment) need to output to the amplifier or active speakers. 6, simple operation, balanced signal selection switcher to solve the complicated line plugging operation. The need to input the signal source of the device is connected to the switcher can be easily and conveniently selected. 7, this product can achieve three interface conversion mode: XLR to XLR, XLR to RCA, RCA to XLR. [product presentation] Do you have 2 sets of balanced XLR signal devices with 2 sets of balanced XLR signal outputs that need to be connected and stuck? Do you want to achieve balanced XLR signal to unbalanced signal RCA? Are you stuck with an unbalanced RCA signal to a balanced XLR signal? A powerful balanced signal stereo selector switcher can solve the problem of multi-device connection and plugging. No external power supply, no loss switching. Colour:black Material:Metal Package Contents: 1 X Fully balanced audio signal selector switcher 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.