Usage Tips: Stable characteristics, high reliability. 1. The MOST Diagnostic Kit helps quickly identify fault points related to the motherboard transceiver or cable connection issues. 2. The optical fiber loop allows removal or addition of a single vehicle component without affecting the car's fiber-optic network. 3. It can diagnose and locate fault points at any node in the MOST (Media Oriented Systems Transport) network. 4. When the Bluetooth phone module is damaged, causing intermittent sound or no output, the fiber from the phone module can be disconnected and connected to the fiber loop. This deactivates the Bluetooth phone function and restores operation immediately. Fitment for compatible vehicle models. Attenuation: less than 180 dB/km Working temperature: -55°C to +85°C Color: Black Material: Plastic Size: 11.5 cm x 2.5 cm x 1.2 cm (L x W x H) Core diameter: 1.0 mm Finished product diameter: 2.3 mm Package Contents: 1 x Male Connector, 1 x Female Connector Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.