Question 1

has anyone used this to connect via bluetooth? i am looking to connect an android smartphone and a surface pro 3.

Accepted Answer

It's not bluetooth but In the case of the Surface Pro 3 you can connect the usb transceiver of the keyboard to the usb port of the surface (if you don't have space in the port you can buy an usb hub to connect multiple usb divices including the usb tranceiver of the keyboard). In the case of an Android smartphone also you can use it but you need to buy an OTG cable (https://www.amazon.com/dp/B00LN3LQKQ/ref=cm_sw_r_cp_apa_aV3rxbAXHV1FH) and connect the tranceicer to the android device, it would work (I proved in Galaxy Alpha, S6, Tab S2, Motorolas and works perfect)

Question 2

Has the build quality improved? The original K400 left a lot to be desired in this area (letters rubbing off, mushy keys, creaky flexing body).

Accepted Answer

Just arrived and used it for 2 days. Met my expectations as a couch keyboard. The trackpad works well and the left-mouse-button key at the top left is rather handy. Build quality is fine given its price, but definitely inferior to the K480 and K800 that I have. Haven't used the original K400, but haven't seen yet (it's been 2 days only) the old problem of letters rubbing off. Keyboard body is reasonably solid. Don't expect this to be your day-to-day working keyboard -- the keys are too soft for a good typing experience.

Question 3

Has anyone used this with a Steam link device?  Any issues?

Accepted Answer

I just got this today specifically to try on steam link. Yes, it does work and at a surprising distance. Track pad and keyboard working. So for steam link users :) this keyboard does work.

Question 4

Will this work with a Samsung un40eh5300fxza that appears to be running under Linux?

Accepted Answer

Yes it works with several versions of Linux that I have on several computers. Just plug & play on my machines. You won't get keyboard customizations provided with Logitech software though. Linux recognizes it as an ordinary keyboard on my machines. I guess you can check if the company's website has Linux software for customization settings, but I didn't bother because it works. I use these for computers connected to home entertainment centers, not for my primary computers. So they don't get typed on much because they're used mostly to navigate & use media. Nonetheless, the letters on several keys rubbed off after just a couple moths of very light use. A year later almost half the keys don't have letters on them anymore. I never had letters rub off keyboards before, & I've used dozens of them. I'm typing this on a HP keyboard (my favorite) built in 1999. None of the letters are wore off after extremely heavy usage for almost 2 decades.

ASIN	B014EUQOGK
Additional Features	Built-in touchpad, Customizable controls, Media-friendly design, Wireless freedom
Antenna Location	Multimedia
Best Sellers Rank	#2 in Computer Keyboards
Brand	Logitech
Built-In Media	2 AA batteries (pre-installed), USB range extender, Unifying receiver, User documentation, Wireless Touch Keyboard
Button Quantity	84
Color	Black
Compatible Amazon Tablet Models	Amazon Fire 7 12th Generation, Amazon Fire HD 10 13th Generation, Amazon Fire HD 8 12th Generation
Compatible Devices	Multi OS Device
Compatible Operating System Family	ChromeOS, Windows
Compatible Tablet Computer Models	Amazon Fire 7 12th Generation, Amazon Fire HD 10 13th Generation, Amazon Fire HD 8 12th Generation
Connectivity Technology	RF, Unifying Receiver
Customer Reviews	4.4 4.4 out of 5 stars (40,090)
Enclosure Material	Acrylonitrile Butadiene Styrene
Generation	2nd Generation
Global Trade Identification Number	00097855115300
Hand Orientation	Ambidextrous
Is Electric	No
Item Dimensions L x W x H	13.95"L x 5.5"W x 0.93"H
Item Weight	0.86 Pounds
Keyboard Description	wireless qwerty
Keyboard Layout	QWERTY
Manufacturer	Logitech
Mechanical Keyboard Switch Model	chiclet
Mfr Part Number	920-007119
Minimum Required Operating System Version	Windows 7
Model Name	K400 Plus
Model Number	920-007119
Number of Batteries Required	2
Number of Keys	84
Number of Sections	3
Power Source	Battery Powered
Processor Count	1
Series Number	7119
Style Name	PLUS
Switch Type	Linear
Theme	Home Entertainment
UPC	097855115300
Unit Count	1.0 Count
Warranty Description	Manufacturer’s warranty can be requested from customer service.
Water Resistance Level	Water Resistant

Logitech K400 Plus Wireless Touch TV Keyboard with Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-Connected TV, Windows, Android, ChromeOS, Laptop, Tablet - Black

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