-The thread pitch is 8mm, 10mm, 12mm (which are all inside one shift knob to fit most manual cars). -To install, simply twist, loosen, and remove the stock shift knob and replace with this LED shift knob. -There are LED that are built into this shift knob which are activated by simply touching it, the LED light will stay on for 30 seconds and automatically turn off afterwards. -The LED are powered by an internal battery source which is rechargeable. (In the meanwhile of 30 seconds, the light colors will change automatically). -A charger is included in this package so you can recharge it with the car cigarette lighter outlet. Fit for most of manual car vehicles, some Automatic( without button device) -No switch needed, when you touch it, it will automatically light on. -Every time when the light turn on, it will last 30 seconds. -Genuine Leather Scrub sense, very comfortable. -Beautiful Luminous line, kind of noble. -LED Color: 6 Models -Material: Leather + aluminum + plastic lens. -Built-in rechargeable high-quality lithium battery. -When first charge, 8 hours are required. Then for the later charge, 1 hour is enough. With one-time charge, this shift level knob can work about one month. 1 X Gear Shift knob 1 X USB line 1 X Charge 1. Compatibility:Fit for most manual Cars vehicles, some Automatic( without button device) 2. Regarding the color of the light, the color on the picture is different from the actual one, and the color of the light seen by the naked eye is more vivid. 3. When you receive the gear shift knob, the first use of the light may not work and you need to charge it first.