New and high quality with stable characteristics and high reliability. This MOST Diagnostic Kit helps quickly locate fault points, whether the issue is with the motherboard transceiver or cable connections. The optical fiber loop allows removal or addition of a single vehicle device without affecting the car's fiber-optic network. It can diagnose and identify fault points at any node in the MOST (Media Oriented Systems Transport) system. When the Bluetooth phone module is damaged, causing intermittent sound or no sound when the stereo is turned on, the fiber head of the phone module can be disconnected and connected to the fiber loop, deactivating the Bluetooth phone function and restoring normal operation immediately. Attenuation: less than 180dB/km Working temperature: -55°C to +85°C Color: Black Material: Plastic Size: 115cm x 25cm x 12cm (L x W x H) Core diameter: 10 Finished product diameter: 23*2 Package Contents: 1 x Male Connector 1 x Female Connector Note: Light and different displays may cause slight variations in the color of the item in the picture compared to the actual item. Measurement may vary by +/- 1-3cm.