The EM-50-H is a 125 Khz proximity card reader for mounting in a single-gang electrical box. Both black and white cosmetic covers included. This H version reads Indala and some HID proximity cards.
Datasheet available here: EM_TDS.pdf (farpointedata.com)
If there are questions about compatibility of this reader with your card or application, please email sales@shopandlock.net before ordering.
Indala, HID is a registered trademark of HID Global Corp, an Assa Abloy company.