Keri's NXT Series Proximity Readers are designed to blend aesthetics, read range performance and small package size with an extremely thin profile into a product that is priced significantly less than competing proximity readers. The readers are for use exclusively with Keri's revolutionary access control system based on the NXT Series of IP-Based Controllers. Encrypting identification data between the card and reader and supervising the reader from the controller to check for failure provides the most secure reader solution available. With an allowable cabling distance of 1000 feet (300m) from the controller, the NXT Series of readers dramatically reduces cabling costs when compared to traditional 6 or 7 conductor reader interfaces. The readers are compatible with all NXT Series cards and tags, with the ability to be firmware flashed to read HID 125 KHz credentials. The NXT-3R Mullion Reader, designed for mounting on metal window doorframes/mullions, is one of the smallest proximity readers on the market yet offers exceptional read range.