1、We put a blank chip into the smart carbon fiber ring. Therefore, don't worry that you can't add it to your car. 2、The key ring is convenient to use when you are unable to use the phone, the battery is unable to use or others need to use it temporarily. 3、To lock or unlock, click the key ring in the center of the pillar on the right side of the driver window. 4、The key ring is lightweight, waterproof, easy to carry, bring it in your hand to unlock. And can be easily entered and exited in any situation. 5、Carefully selected carbon fiber material, which makes it have smooth and clear texture. Item Type: Smart Key Ring Material: Carbon Fiber Color: Black Inner Diameter:Approx. NO.6: 16.5mm/0.65in, NO.7: 17.3mm/0.68in, NO.8: 18.1mm/0.71in, NO.9: 18.9mm/0.74in, NO.10: 19.8mm/0.78in, NO.11: 20.6mm/0.81in, NO.12: 21.4mm/0.84in Fitment: Fit for Tesla model 3 All Years Fit for Tesla model Y All Years Fit for Tesla model X 2021-2023 Fit for Tesla model S 2021-2023 How to Use: 1. Organize and clear the central control sensing area 2. Click the car shape button in the lower left corner of the central control screen 3. Click the middle lock button 4. Click the "+" to the right side of the key 5. Put our smart ring on the central control induction area 6. When the screen pops up "Induction of existing key card to approve pairing", place the original car key/card in the central control induction area for authorization and wait for completion. 1 x Smart King Ring 1 x Packing Box