Editing Proximity card (section)

=== Active cards ===
Active 125&nbsp;kHz prox cards, sometimes called [[vicinity card]]s{{dubious|Active cards working on 125 kHz may not be called vicinity cards|date=December 2018}}, are powered by an internal lithium battery.  They can have a greater range, up to 2 meters (6&nbsp;ft). Other contactless technologies like UHF (Ultra High Frequency) smart cards  can reach up to 150 meters (500&nbsp;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]].<ref name="Norman" />  The battery eventually runs down, however, and the card must be replaced after 2 to 7 years.