The wire has a powerful socket to prevent combustion, precise mold shaping, stability, safety, and strong anti-interference. extension wires are made of new environmentally friendly plastic materials. You can independently control the power supply and power-off of the OBD device to prevent the OBD device from consuming power after the car is turned off. Car extension cable with switch Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour: Black Material: Plastic Package Contents: 1* OBD Switch Cable Diagnostic Tool 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.