4-channel, supports 4 inputs and 4 outputs.Input and output isolation, with isolation insulation withstand voltage of more than 300Vp-p.Low noise floor, no 50Hz AC noise and high-frequency interference, high sound quality.Point-to-point unbalanced transmission audio, input and output can be from the front and rear panels.Strong anti-common mode interference capability, CMRR 60dB.No IP settings required, no security vulnerabilities.Plug and play, no power supply and drive required.Isolated filtered audio transmission, up to 450-600 meters.Built-in transient, surge suppression, and anti-static protection circuits.Analog ground loop isolation and noise reduction processing.Equipment insertion loss: less than 0.5dBReturn loss: 18dBInput level range: 0.5Vp-p to 3Vp-pFrequency response: 20Hz-20kHz, error within 0.2dB (reference 1kHz)Common mode rejection: 68dB@1kHzStereo channel isolation: 62dBInput impedance: 600Input interface: 4-way with line interfaceOutput impedance: 600Output interface: 4-way female interfaceRated loss: less than 0.5dB (reference 1kHz, 1Vrms)Insulation resistance: 100M at DC1000VIsolation voltage: AC50Hz-60Hz, 0V-1500VMaximum input level: +6dBuApplication:1. safe transmission between systems and protect equipment from being burned by ground voltage difference2. the current acoustic interference noise generated by the car/server projection LED link mixer3. Improve sound, remove burrs, remove digital flavor, and purify sound4. the current acoustic noise generated by impedance mismatch between devices5. the current acoustic noise between simultaneous interpretation equipment and mixerColour:BlackMaterial:Aluminum alloyPackage Contents:1 x Audio isolatorOnly 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.