and high quality 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 problems 2.The optical fiber loop can remove or add a single vehicle equipment, and do not affect the car fiber-optic network 3.It also can diagnose and find fault point when a node in the MOST (Media Oriented Systems Transport) 4.Bluetooth phone module was often when opening stereo the sound intermittently, sometimes no sound, the fiber head of the phone module can be pulled out, connected to the fiber loop, deactivate the Bluetooth phone function, audio immediately return to normal. Fitment for , ,,. Attenuation: less than 180dB/km Working temperature: -55 Celsius - +85 Celsius colour:black Material:plastic Size:11.5cmX2.5cmX1.2cm(LXWXH) Core diameter: 1.0 Finished product diameter: 2.3*2 Package Contents: 4 x Male Connector 4 x Female Connector Only the above package content, other products are not included. Note: Light reflection 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.