CRS305-1G-4S+IN: Five-port desktop switch with one Gigabit Ethernet port and 4 SFP+ 10Gbps ports Click to enlarge With dual PSU sockets!The CRS305 is a compact yet very powerful switch, featuring four SFP+ ports, for up to 10 Gbit per port. The device has a 1 Gbit copper ethernet port for management access and two DC jacks for power redundancy. The device is a very sleek and compact metallic case without any fans, for silent operation.The device has a �Dual boot� feature that allows you to choose between two operating systems - RouterOS or SwOS. If you prefer to have a simplified operating system with only switch specific features, use SwOS. If you would like the ability to use routing and other Layer 3 features in your CRS, use RouterOS. You can select the desired operating system from RouterOS, from SwOS or from the RouterBOOT loader settings. All the feature set comes with a disruptive price, providing the best price/performance on the market. Product specifications: Details Product code CRS109-8G-1S-2HnD-IN Architecture ARM 32 bit CPU 800 MHz 98DX3236 CPU core count 1 Size of RAM 512 MB Storage 16 MB Flash Tested ambient Temp -40�C to 70�C Dimensions 141 x 115 x 28 mm Powering PoE in 802.3af/at PoE in input Voltage 12-57 V DC Inputs PoE in, DC Jack x 2 DC Input voltage 12-57 V Max power consumption 18 W (10 W without attachments) Interfaces 10/100/1000 Ethernet 1 SFP+ ports 4 Other CPU Temperature Monitor yes quick guide product brochure