This is an underwater flower LED shift knob. The shift knob is 20cm long and has a maximum width of 4.5cm. Inside the shift knob is silver foil, which sparkles and creates a beautiful and fantastic effect. Adapters for m8x1.25, m10x1.5, and m10x1.25 are included (3 types). The main body thread diameter is M12 x 1.25. Power can be connected via USB. It can also be connected via a cigarette socket using the included 12v/24v compatible cigarette socket unit. The LED is rainbow-colored, changing slowly between red, blue, green, etc. Please understand that there may be minor shipping scratches as this is an overseas product. Thank you for your consideration.