Black & Grey. PAC HF readers are designed for installations that need reliability and security. This keypad and proximity reader provides the one single reader solution that supports all PAC RFID credentials as well as support for all standard LF and HF credentials supported via Wiegand protocols, making it ideal for use where support of multiple ID Device types is required.. Integral tamper circuit and mounting plate. Audible sounder and red/green led's. Internal or external frame fitting. Pin code entry via keypad