3.5mm male input and XLR male output. The product provides level signal volume adjustment control. Effectively isolate ground loop noise, interference noise caused by phase differences between ultra-long audio cables and different audio devices, and bring you clean and lossless audio. Safe hot plug: helps protect the transmission between audio devices, prevents them from being burned due to voltage differences or static electricity, and prevents popping noise when plugging or unplugging wires. Grounding setting: With left and right grounding switches and a universal grounding switch, interference caused by grounding problems can be avoided. The product uses high-performance to noise, Eliminates voltage loop and cuts line noise in a compact metal enclosure that's perfect for touring and bring great sound to countless gigs. Wide application: It is widely used in laptops, MP3 players, CD players, mobile for phones, tablets) and other line level signals to convert the left channel and right channel summed microphone-level balanced signal output. Colour:Black Material:Aluminum Alloy Package Contents: 1 * Audio isolator 1 * Storage bag(The color and style of the storage bag are random, no specification is accepted) 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.