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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🚀 Power your network with silent speed and smart control!

FLEXIBLE OS CHOICE - Switch effortlessly between RouterOS and SwOS for tailored network control.
SILENT SLEEK COMPACT - Fanless metal case keeps noise at zero while fitting perfectly on your desk.
BLAZING 10 G CONNECTIVITY - Four SFP+ ports deliver ultra-fast 10 Gbps speeds for future-proof networking.
EFFICIENT MANAGEMENT PORT - Dedicated 1 Gbps Ethernet port for smooth, hassle-free device management.
UNINTERRUPTED POWER ASSURANCE - Dual DC jacks ensure seamless power redundancy—stay online no matter what.

The MikroTik CRS305-1G-4S+IN is a compact, fanless managed switch featuring four 10 Gbps SFP+ ports and a 1 Gbps Ethernet management port. It offers dual DC power inputs for redundancy and supports dual boot between RouterOS and SwOS, providing versatile Layer 2 and Layer 3 networking capabilities in a sleek metal chassis.

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Product dimensions	14.1L x 11.5W x 2.8H centimetres
Item weight	1 Pounds
Voltage	57 Volts
Case material type	Metal
Interface type	SFP+
Data transfer rate	1000 Megabits Per Second
Global Trade Identification Number	00680392660855, 05903148914527
Manufacturer	Mikrotik
UPC	680392660855
Item model number	CRS305-1G-4S+IN
Series	CRS305-1G-4S+IN
Processor Count	1
Wireless Type	Radio Frequency
Number of Ethernet Ports	1
Wattage	10 watts
Are Batteries Included	No
Item Weight	454 g
Guaranteed software updates until	unknown

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

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