... type design of smart key, easy to carry, can insert in wallet. *Double ensure. Backup transponder (credit card figure, ... Doors AutomaticallyAs you approach your vehicle and arrive in range of 1.5 to 2 meters, the ... will verify if there is legal access key in the car before allowed to start. It can ... the access keys and the base which installs it in vehicles, and also we used hopping code technology ...