But the problem is that not all psychic readers are created equal and it can be very difficult deciphering between the fake mediums and the legitimate ones. For every authentic psychic that wants to use their natural gift to provide accurate advice and to help others, there are just as many scammers, con-artists, and charlatans looking to prey on unsuspecting victims.
Memory Card Supported: CompactFlash Type I, CompactFlash Type II, Microdrive, Secure Digital (SD) Card, Secure Digital High Capacity (SDHC), miniSD Card, MultiMediaCard (MMC), MMCplus, Reduced Size MultiMediaCard (RS-MMC), MMCmobile, microSD Card, microSD High Capacity (microSDHC), TransFlash, Memory Stick, Memory Stick Duo, Memory Stick PRO, Memory Stick PRO Duo, Memory Stick Micro (M2)
All biometric readers work similarly, by comparing the template stored in memory to the scan obtained during the process of identification. If there is a high enough degree of probability that the template in the memory is compatible with the live scan (the scan belongs to the authorized person), the ID number of that person is sent to a control panel. The control panel then checks the permission level of the user and determines whether access should be allowed. The communication between the reader and the control panel is usually transmitted using the industry standard Wiegand interface. The only exception is the intelligent biometric reader, which does not require any panels and directly controls all door hardware.
There are two types of smart cards: contact and contactless. Both have an embedded microprocessor and memory. The smart card differs from the proximity card in that the microchip in the proximity card has only one function: to provide the reader with the card's identification number. The processor on the smart card has an embedded operating system and can handle multiple applications such as a cash card, a pre-paid membership card, or an access control card.