https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
DG-1000M Mifare High Frequency 13.56MHz Stand-alone Proximity Reader and Controller

DG-1000M Mifare High Frequency 13.56MHz Stand-alone Proximity Reader and Controller

GIANNI INDUSTRIES INC.
Region: Taiwan
Update: 04/14/2007
Key Specifications
*Allows up to 1000 proximity cards and PIN codes

*Tamper switch and alarm buzzer included

*Fully Programmable via keypad and master code

*Access mode selectable: card only  card or PIN  card+PIN

*Logical memory to prevent duplication

*Invalid PIN Lock-out

*Beeper sound gives of keypad composition

*Non-Volatile Memory

*Removable memory chip replacement

*Mifare High Frequency 13.56MHz

*Stand-Alone Proximity Reader with USB Connector

*Software Free of Charge

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions