Would you like to network your fish finders together but don’t have a lot of room in your boat? Would you like to spend less than $100 for a smaller port expander with greater capabilities (100Mbps vs 1000Mbps)? Well, meet the Mini Net-X-Tender. The Mini Net-X-Tender is a commercially available Industrial port expander that is made for use in harsh environments. The Mini Net-X-Tender is a smaller version, but with the same functionality as it’s big brother the Net-X-Tender V2.0. The Mini Net-X-Tender has a footprint of only 3 ¾ in x 2 ¾ in which means that every boat is now capable of having a functional marine network. 
NOTE: The Mini Net-X-Tender is water resistant not Waterproof
 
                                              Mini Net-X-Tender Specifications
Supports auto-negotiation and 10/100Mbps half/full duplex and 1000Mbps full duplex. Auto - MDI/MDI-X function with a capacity of 10Gbps/non blocking. Standard: IEEE802.3 10Base-T Ethernet, IEEE802.3u 100Base-TX Fast Ethernet, IEEE 802.3x flow control
The Mini Net-X-Tender supports 12~48V DC input and is Reverse Polarity Protected. With Redundant power supply inputs; loss of power is not an issue.
Consumes less than 6 Watts of power while in use.
Case Material: Metal
The Mini Net-X-Tender is 3.74 in x 2.76 in x 1.18 in (95mm x 70mm x 30mm).
The Mini Net-X-Tender as an Industry standard design, dust-proof and closed design IP40 compliant that uses industrial grade components and has a wide temperature range of -40°F to 167°F (-40°C to 75°C). It can even be used it in outdoor harsh environment.
ELECTRO MAGNETIC COMPLIANT & Surge Protection – Industrial DIN-rail switch complies with CE EN 55022 Class A standards, with surge protection design.