Manufacturer	Hirschmann
Product Type	Spider SL-20 4 Port
Description	Unmanaged, Industrial ETHERNET Rail Switch, fanless design, store and forward switching mode , Fast Ethernet
Part Number	942132019
Port Type and Quantity	4x 10/100BASE-TX, TP cable, RJ45 sockets, auto-crossing, auto-negotiation, auto-polarity, 1 x 100BASE-FX, MM cable, ST sockets
Operating Voltage	12/24 V DC (9.6 – 32 V DC)
Dimensions (W*H*D)	26 x 102 x 79 mm (w/o terminal block)

The SPIDER III family of industrial Ethernet switches reliably transmit large amounts of data across any distances. These unmanaged switches have plug-and-play capabilities to allow for quick installation and startup, without any tools to maximise uptime. For technical details https://proplasint.com/hirschmann-spider-iii-switches/