Does an Ethernet splitter slow down speed?

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RJ45 Ethernet Splitter Adapter, EEEkit USB to RJ45 Port Dual Female 1 to 2 LAN Ethernet Network Splitter Connector Adapter Support Cat5 Cat5e Cat6 Cat6e Cat7 Ethernet Cable, Black

Please NOTE: Equipped with a 1.2m/4ft USB charging cable, it can support charging and networking at the same time. CAN NOT be used without connection.

CableGeeker Ethernet Splitter High Speed, 100Mbps Ethernet Splitter 1 to 2 [2 Devices Simultaneous Networking], RJ45 Internet Splitter with USB Power

Ethernet Splitter 1 to 2: 1000Mbps RJ45 Ethernet Splitter splits a single network cable into two outputs to connect to a TV, computer, router and

1000Mbps Ethernet Splitter 1 to 2, Ethernet Splitter High Speed for Cat7/Cat6/Cat5e/Cat5, RJ45 Internet Splitter Network Switch with USB Power Cable

Ethernet + Power Adapter with Lightning Connector

Ethernet Switch vs. Hub vs. Splitter: What's the Difference - ElectronicsHub

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Does an Ethernet splitter slow down speed?

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