MikroTik S-RJ01 - Gigabit Ethernet - 10,100,1000 Mbit/s - 0.1 km - 1.25 Gbit/s - 0-85 °C - RoHS
The MikroTik S-RJ01 is a Gigabit Ethernet switch module designed for use in networking applications. It supports data transfer rates of 10, 100, and 1000 Mbit/s, has a maximum distance of 0.1 km, and can handle up to 1.25 Gbit/s of traffic.

Mikrotik is a Latvian company that makes computer networking equipment, including routers, switches, and wireless access points. Mikrotik's products are popular among network administrators and hobbyists for their low cost and feature-richness.