1. Low noise floor, no 50Hz AC "" sound, no high-frequency "la" interference, CD sound quality 2. Point-to-point balanced audio transmission, optional (RCA interface audio isolator 3.Excellent 60dB-CMRR, high anti-common mode interference suppression capability 4. Made of aerospace materials, with ultra-high sensitivity and low illumination attenuation characteristics 5. Plug and play, no restrictions required, no need to import files during installation and debugging 3.5mm audio cable (male and female) A pair of isolated filtered audio transmitters, which can transmit video signals up to 450-600 meters Supports plug-and-play, hot-swappable, no power supply, no software setup and maintenance required. put Built-in transient, surge suppression, and anti-static protection circuits PVC plastic is waterproof, small in size and light in weight 24X7X365 working around the clock, stable and reliable performance Stereo isolation and squelch function Equipment insertion loss Less than 0.5dB Return loss: 18dB Due to different production batches, the appearance will be slightly different. The actual product shall prevail and does not affect use. Colour:Black Material:plastic+metal Size:7x4.5x3cm Package Contents: 1 x 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.