Medium Sized, NXT Reader. The NXT-5R measures 4.18" high by 2.95" wide by .625" deep (10.6cm high x 7.5cm wide x 1.6cm deep) and can be mounted on a US single gang electrical box or flat on a wall. Read range is up to 6″ (15cm) when mounted at least one inch off metal. If the reader is mounted using a metal electrical junction box with the thickness of the wall material separating the reader from the box, read range will be reduced. They can now be configured to read certain HID 125kHz cards and tags such as the HID Prox II Credentials, thus providing all of the benefits listed above and eliminating the need for an NXT-WI or NXT-RM3 Reader Interface Board.