Brand new and high Stable characteristics, high reliability. 1.The Diagnostic Kit to help you to quickly find the fault , whether it is the problem of the motherboard transceiver, or cable connection problems 2.The optical fiber loop can remove or a single vehicle equipment, and do not affect the car fiber-optic network 3.It also can diagnose and find fault when a in the (Media Oriented Transport) 4.Bluetooth phone module often damaged 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: 1x Male Connector 1x Female Connector Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.