MOST Fiber Optic Loop Bypass Male and Female Kit Adapter for BMW Mercedes-Benz Stable characteristics, high reliability 1. The MOST Diagnostic Kit helps quickly locate fault points, whether due to motherboard transceiver issues or cable connection problems 2. The optical fiber loop allows removal or addition of a single vehicle device without affecting the car's fiber-optic network 3. Can diagnose and identify fault points when a node in the MOST (Media Oriented Systems Transport) fails 4. Bluetooth phone modules often cause intermittent sound or no audio when the stereo is opened; the fiber head of the phone module can be disconnected and connected to the fiber loop to deactivate the Bluetooth phone function, restoring normal audio output Fitment for compatible BMW and Mercedes-Benz vehicles 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 x 2 mm Package Contents: 1 x Male Connector 1 x Female Connector Note: Light and display differences may cause slight color variation between the image and actual item. Measurement error allowed is +/- 1-3 cm.