Welcome to high security The most awarded access control reader in the world Designed for small spaces Up to 6 cm reading range Increase your buildings security with the STid Arc One Mullion MIFARE reader. Designed specifically to fit into small spaces such as door frames or narrow mounting, the Arc One Mullion reader is easy to incorporate into any installation environment. Weather-resistant with waterproof electronics, this access reader offers high impact resistance and is sure to stand the test of time. The STid Mullion reader operates at 13.56 MHz frequency and is one of the most secure, compact readers on the market. Manufacturer part number: Standard: ARC1-R31-B/PH5-3i/1 Bluetooth: ARC1S-R31-B/BT1-3i/1