LEXUS, Lexus genuine smart key. The mark color is blue. This is a smart key that was included with the RX Hybrid, I believe. It should fit the 20 series RX, but I think it will also fit other Lexus models, so please check the part number, etc.♪ Circuit board part number: 231451-0010 7/10 Part number on the gray circuit board cover: 007-AC0147 14FAD It's used, so there are some scratches, but it's in good condition. Of course, there are no problems with use.♪ Please check the images for details, and please purchase after you understand that re-registration and compatibility are your own responsibility. It comes with a new battery and has been tested to work, so please rest assured.