The HID-921NTN is an iClass Reader from HID that comes with SIO & SEOS with Legacy, Wiegand, Black. The iCLASS SE RK40 is part of HID Global's iCLASS SE platform for adaptable, interoperable access control. Designed for multi-factor authentication door applications requiring standard wall switch mounting, iCLASS SE RK40 supports a broad array of credential technologies and a variety of form factors, including cards, fobs and mobile devices. Configurable to support HID Mobile Access. With a focus on sustainability, iCLASS SE platform readers include intelligent power management that reduces power consumption by as much as 59%. Selected models also have Environmental Product Declaration certification and Green Circle certification, which contributes toward LEED building credits.