This module is different from the ENC28J60 Ethernet Shield only in its form factor and the fact that there is no SD card slot.
ENC28J60 Ethernet Module utilizes the new Microchip ENC28J60 Stand-Alone Ethernet Controller IC featuring a host of features to handle most of the network protocol requirements. The board connects directly to most microcontrollers with a standard SPI interface with a transfer speed of up to 20MHz.
Specifications
Clock Speed
25
MHz
Interfaces
Network interface board HR911105A
Length x Width
56mm x 34mm
mm
Operating Voltage
3.3
V