Feature:1. Applicable Model: This key replacement for Model 3/X/S/Y All years, especially for this model, please check your model carefully.2. No Charging: The key is convenient to use when the phone is inaccessible, out of battery, or other people needs temporary access.3. Antitheft Unlock: The operation is simple, just click the key in the center of the pillar on the right side of the driver window to lock or unlock.4. Delicate Texture: Carefully selected carbon fiber material with and clear texture, which looks stylish, and it is rugged and durable.5. Comfortable: The key is lightweight and waterproof. We managed to keep the light and thin to make it comfortable to wear.How to Use:1. Organize and clear the central control sensing area;2. Click the car shape button in the lowerrleft corner of the central control screen;3. Click the middle lock button;4. Click the + to the right 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.Specification:Item Type: Smart Key RingMaterial: Carbon fiberColor: Blue Fitment:Replacement for Model 3 All yearsReplacement for Model X All yearsReplacement for Model S All yearsReplacement for Model Y All yearsPackage List:1 x Smart Key