It is a USB3 1Gbit/s adapter. I tested it at 1Gbit/s speed - works fine for long periods (several hours).

Bus 002 Device 010: ID 2001:4a00 D-Link Corp. D-Link DUB-1312

T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 10 Spd=480 MxCh= 0
D:  Ver= 2.10 Cls=ff(vend.) Sub=ff Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=2001 ProdID=4a00 Rev=01.00
S:  Manufacturer=D-Link Elec. Corp.
S:  Product=D-Link DUB-1312
S:  SerialNumber=**************
C:  #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=248mA
I:  If#=0x0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=00 Driver=ax88179_178a

Settings for enp0s29f7u2:
	Supported ports: [ TP MII ]
	Supported link modes:   10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Half 1000baseT/Full 
	Supported pause frame use: No
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  10baseT/Half 10baseT/Full 
	                        100baseT/Half 100baseT/Full 
	                        1000baseT/Full 
	Advertised pause frame use: Symmetric
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full 
	                                     100baseT/Half 100baseT/Full 
	Link partner advertised pause frame use: Symmetric Receive-only
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 100Mb/s
	Duplex: Full
	Port: MII
	PHYAD: 3
	Transceiver: internal
	Auto-negotiation: on
	Supports Wake-on: pg
	Wake-on: g
	Current message level: 0x00000007 (7)
			       drv probe link
	Link detected: yes