Security: The smart key system provides security and anti-theft functionality to help prevent theft and unauthorized access. Adaptability: Smart keys allow quick door unlocking and vehicle start-up, enhancing user experience. Easy to operate: The smart key is simple and convenient to use, designed for easy understanding and fast operation. Radio frequency identification technology: Smart car keys use radio frequency identification technology to communicate with the vehicle at a specific frequency, enabling remote control of door locks, engine start, and other functions. Buttons: 2 buttons Frequency: ASK 433MHz FCC ID: M0ZB31EG / MOZB31EG ID: B31EG-485 Compatible with: for Prius 2004-2009 Material: plastic + metal Color: black Package Contents: 1 x Remote Key Kit 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 to vary slightly from the actual item. Measurement allowance is +/- 1-3 cm. (Casing only)