Usage Tips:and Stable characteristics, high reliability.1.The MOST Diagnostic Kit to help you to quickly find the fault point, whether it is the problem of the motherboard transceiver, or cable connection problems2.The optical fiber loop can remove or add a single vehicle equipment, and do not affect the car fiber-optic network3.It also can diagnose and find fault point when a node in the MOST (Media Oriented Systems Transport)4.Bluetooth phone module was often damaged when opening stereo the sound intermittently, sometimes no sound, the fiber head of the phone modulecan be pulled out, connected to the fiber loop, deactivate the Bluetooth phone function, audio immediately return to normal.Fitment for, ,,.Attenuation: less than 180dB/kmWorking temperature: -55 Celsius - +85 Celsiuscolour:blackMaterial:plasticSize:11.5cmX2.5cmX1.2cm(LXWXH)Core diameter: 1.0Finished product diameter: 2.3*2Package Contents:1x Male Connector1x Female ConnectorOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.