All three Keri Proximity Credentials can be used interchangeably, and are available in both “off the shelf” pre-programmed and custom facility code/ID range versions of industry-standard 26-Bit Wiegand format. Each is comparable to HID® ProxCard II 26-Bit credentials. Custom card formatting is also available as required for adding credentials to existing applications. For specific 26-bit facility code and ID ranges, customers simply need to provide facility code, and internal/external and start/stop ID numbers. ProxCard II is a registered trademark of the HID Corporation.