Can i have a 5gbe device working on the 10gb port (at 5gb speed)?

Haven’t specifically tried 5Gb, but I’ve done 2.5gbe and it worked perfectly! If the SFP supports the multi-gb rates, the Mikrotik will be ok!

Does this have PoE out on all 4 ports please?

It does not have PoE out on any port. I don't think you can get PoE out of any SFP port on any switch. You can power the switch itself on PoE via the Ethernet RJ45 port.

Does this device has switch os or router os, what ever this device has what version number this will be supplied.

I've had three of these now and all of them have come with RouterOS enabled by default. It can be changed to SwOS in the menu. They are not very easy as a starter switch so suggest that you do some research first one thing to remeber is that the settings are not transferable between the different modes RouterOS and SwOS, they are completely seperate. There are some caveats to the setup and negatives and positives of using either RouterOS or SwOS to be aware of.

Does it include a UK power plug?

Mine came with a PSU that had a 2 pin connector for power (non UK), I used a travel adapter to connect up to the wall.

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CRS305-1G-4S+in Network switch Managed Gigabit Ethernet (10/100/1000) Ethernet power (PoE) White

Product ID: 164328881

Details

Brand
MikroTik
Colour
Silver
Compatible devices
Desktop
Included components
2 DC jacks
Number of ports
5

⚡4x 10G SFP+ ports

🔄Dual boot OS flexibility

🔇Fanless silent metal case

€ 313.47

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your network game with silent 10G power and OS freedom!

SILENT POWERHOUSE - Fanless, compact metal chassis ensures whisper-quiet operation and sleek professional aesthetics.
EFFORTLESS MANAGEMENT - Dedicated 1 Gbps Ethernet port for smooth, hassle-free device management and monitoring.
CHOOSE YOUR NETWORK OS - Dual boot system lets you switch effortlessly between RouterOS and SwOS for tailored network control.
BLAZING 10 G CONNECTIVITY - Four SFP+ ports deliver ultra-fast 10 Gbps per port for seamless high-speed data transfer.
REDUNDANT POWER RELIABILITY - Dual DC jacks provide power redundancy, keeping your network online without interruptions.

The MikroTik CRS305-1G-4S+in is a compact, fanless managed network switch featuring four 10 Gbps SFP+ ports and a 1 Gbps Ethernet management port. Its dual boot capability allows users to select between RouterOS for advanced routing or SwOS for simplified switching. Housed in a sleek metal case with dual DC power inputs for redundancy, it offers reliable, high-performance networking ideal for professionals demanding speed, flexibility, and silent operation.

Specifications

ASIN	B07LFKGP1L
Best Sellers Rank	41,971 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 242 in Network Switches
Box Contents	2 DC jacks
Brand Name	MikroTik
Case Material Type	Metal
Color	Silver
Compatible Devices	Desktop
Country of Origin	Latvia
Customer Reviews	4.6 4.6 out of 5 stars (1,107)
Data Transfer Rate	1000 Megabits Per Second
Global Trade Identification Number	00680392660855, 05903148914527
Interface	SFP+
Item Dimensions L x W x H	14.1L x 11.5W x 2.8H centimetres
Item Type Name	Network Switches
Item Weight	454 g
Manufacturer	Mikrotik
Manufacturer Part Number	CRS305-1G-4S+IN
Model Number	CRS305-1G-4S+IN
Number of Items	1
Number of Ports	5
Switch Type	Fixed, Managed, PoE
UPC	680392660855
Upper Temperature Rating	40 Degrees Celsius
Voltage	57 Volts

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