The SP-6820-GR-MP AWID and HID Compatible Proximity Reader has a Wiegand and RS232 (simultaneous) interface, 6 to 8 inch Read Range, Single
Gang Box Mount, Keypad Upgradeable, Gray color..
Replaces the SP-6820-GR (Wiegand only)
other part numbers: SP6820 , AWI-SP6820GRMP