Stable characteristics, high reliability 1. The MOST Diagnostic Kit helps you quickly locate fault points, whether the issue is with the motherboard transceiver or cable connections 2. The optical fiber loop allows removal or addition of a single vehicle device without affecting the car's fiber-optic network 3. It can diagnose and identify fault points at any node in the MOST (Media Oriented Systems Transport) network 4. Bluetooth phone modules are often damaged when turning on the stereo, causing intermittent sound or no sound. The fiber head of the phone module can be disconnected and connected to the fiber loop, deactivating the Bluetooth phone function and restoring audio immediately Fitment for: Attenuation: less than 180 dB/km Working temperature: -55C to +85C 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 Finished product diameter: 2.3 x 2 Package Contents: 1 x Male Connector 1 x Female Connector Note: Light and different displays may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm. Only the above package content is included; other items are not included