This is a Portable Program Transfer Device that transfers CNC machine programs from a standard USB flash drive (Thumb Drive, Pen Drive, memory sticka?) to or from the CNC control through the RS232 communications port, also referred to as Drip feed DNC or Up Loading Down Loading. Extension of file name supports: *.?NC, *.TXT,*.NC, *tap NOTICE. This is the version without WIFI connection function. If you are interested in the "WIFI CONNECTION" function, you can access our store ( https://www.ebay.com/str/dnccnc ) or link below. https://www.ebay.com/itm/DNC-WIFI-DNC-FOR-CNC-MACHINE/303249724988?hash=item469b17963c:g:XzsAAOSwPJVdTu9j function A· 04 magnet nuts to mounting on CNC machine A· 06 Buttons: RESET, FUNCTION, BACK, SET, UP, DOWN A· Function: COPY-PASTE, CUT-PASTE, RENAME, DELETE, Make NEW FOLDER: easy management files folders on USB flash drive and internal MEMORY. A· Function AUTO CUTTING: it can cutting by Percent or Line Number. We can see program content after cutting. A· Function SEND a?? Send program to CNC machine, monitoring program content when sending A· Function FORCED SEND a?? Forced transfer a program to CNC machines without the required signal from CNC machines (Skip XON) A· Function RECEIVE ? Receive program / parameter from CNC machine. A· USB/MEMORY capacity monitoring; Format USB flash drive, etc. Replace PC running a DNC software PACKAGE INCLUDES 1DNC + 1 CABLE + 1 ADAPTER