1. Bidirectional converter for unbalanced/balanced signals with multiple interface access. It can convert unbalanced to balanced and balanced to unbalanced signals. 2. Low noise floor, no 50Hz AC , no high-frequency hissing noise, high-quality CD sound. 3. Excellent CMRR ( 60dB-CMRR) with high common-mode interference rejection 4. Plug-and-play operation, no restrictions 5. No IP configuration or firewall required Isolation and filtering for audio transmission, with a maximum transmission distance of 150-300 meters. Built-in transient, surge suppression, and anti-static protection circuits. Performance: 1. Input and output isolation and insulation withstand voltage: 300Vp-p or higher Multi-channel Isolation Squelch Features: Device Insertion Loss Less than 0.5dB, Return Loss 18dB 2. Impedance (Input-Output): 600-600 3. Maximum Input-Output Input Level: 0.5Vp-p (Min) - 1Vp-p - 3Vp-p (Max) 4. Analog Ground Loop Isolation and Squelch Processing 5. Audio Response Bandwidth: 20Hz-20kHz ( Less than 0.2dB ref. 1kHz) 6. Common Mode Rejection: 68dB @ 1kHz 7. Stereo Channel Isolation: 80dB 8. Operating Temperature: -10-85 9. Storage Temperature: -30-70 10. Dimensions: 100mm x 114mm x 44mm Color:As Shown Material:Metal+Plastic Package Contents: 1 * 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.