| gen. | prox card | бесконтактная карта (Passive cards, the more widely used type which were described above, are powered by radio frequency signals from the reader device and so have a limited range and must be held close to the reader unit. Active cards, sometimes called vicinity cards, are powered by an internal lithium battery. They can have a greater range, up to 150 meters (500 ft), and are often used for applications where the card is read inside a vehicle, such as security gates which open when a vehicle with the access card inside approaches, or automated toll collection. WK Alexander Demidov) |