10/100 Mb 32BIT Cardbusdongleless 5.0 mm Type II, credit card size Complies with IEEE 802.3 10Base-T, IEEE 802.3u 100Base-TX PC Card standards 68-pin 32-bit CardBus interface 10/100Mbps auto-sensing Full/half-duplex auto=negotiation for both 10Base-T and 100Base-TX