Price is per unit. *The photo shows two units. Size: 50mm high. *The second image shows a comparison with our standard LED bulb. *For 12V vehicles. Depending on the vehicle model and installation location, the LED may be damaged by a momentary inrush current. In such cases, please take surge protection measures. *We cannot confirm or advise on installation compatibility. *Damage caused by the above reasons is not covered by warranty, so please have a professional install the product.