New and high quality with stable characteristics and high reliability. 1. The MOST diagnostic kit helps quickly identify fault points, whether related to the motherboard, receiver, or cable connection issues. 2. The optical fiber loop allows removal or addition of a single vehicle equipment without affecting the car's fiber-optic network. 3. It can diagnose and locate fault points at a node in the MOST (Media Oriented Systems Transport) network. 4. Bluetooth phone modules often fail when the stereo is opened, causing intermittent sound or no sound. By disconnecting the fiber from the phone module and connecting it to the fiber loop, the Bluetooth phone function is deactivated and o immediately returns to normal. 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 variation between the image and the actual item. Measurement error allowed is +/- 1-3 cm.