... GEM-20016PS is 16-port 10/100Mbps unmanage Fast Ethernet Switch. Adopt professional RTL8309SB switch chips,The switch provides 16-10/100Mbps Auto-Negotiation RJ45 ports, ... All ports support Auto MDI/MDIX function, the Switch ... -mounting design External Power Adapter supply 16-port 10/100M Switch With Plastic Case