cn i use this keyboard with my classroom pc tower?

if it has a USB port and you have permissions to instal a device...yes.

I don't have Fire TV, I uses it with my laptop that connected to HD LED TV.

Hello this keyboard is for android tablets and phones ??

This keyboard is for computers with USB ports, as it has a USB transmitter.

Will this work if i use Samsung galaxy s21 and tv monitor?

It's not a bluetooth keyboard. It has a standard USB transponder that you have to plug in to your device. Any device that you can use with a normal USB keyboard you can use with this keyboard. You can use it with a PS5 or most smart TVs. But probably not with a phone, and not with a TV that you're just using as a monitor. You'd have to plug it into the computer that you're using with the TV.

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⌨️ Elevate your workspace—wireless control, redefined.

SLEEK COMPACT DESIGN - Lightweight and slim profile fits perfectly in any modern workspace or living room setup.
PLUG AND PLAY CONVENIENCE - Includes wireless receiver and batteries so you’re ready to work or binge right out of the box.
EFFORTLESS WIRELESS FREEDOM - Cut the cords and control your laptop from across the room with reliable 2.4 GHz wireless connectivity.
PRECISION MULTI TOUCH TOUCHPAD - Navigate, scroll, and swipe intuitively on the spacious 3.5-inch built-in touchpad—no mouse needed.
WINDOWS OPTIMIZED COMPATIBILITY - Seamlessly pairs with Windows laptops for a smooth, hassle-free experience.

The Logitech Wireless Touch Keyboard K400 combines a full keyboard with a built-in 3.5-inch multi-touch touchpad, delivering wireless control via 2.4 GHz RF. Designed for Windows laptops, it includes batteries and a wireless receiver for immediate use, all in a sleek, lightweight form factor perfect for professional and casual environments.

Reviews

D**Y

キーボードのレイアウトが商品写真と異なる

タイトルの通り。届いた商品パッケージには確かにK400と書かれているがキー配列がWEBの商品写真と異なる。実際に届いたK400のパッケージのキー配列はK400rと同じ様だ。具体的にはF1-F12キーに別のキーが割り当てられている、上部のホットキーの割り当てキーがWEBの商品写真と異なる。写真を追加したので詳しくはそちらを参照して欲しい。少し調べたところ、どうやらK400には仕様の違う初期型と後期型がある様だ。初期型がWEBの商品写真のキー配列。F1-F12キーがそのまま使える。後期型がK400rのキー配列。F1-F12キーはFNキーと当時押しが必要。F1-F12キーがFNキーと同時押しする必要があるK400plusやK400rが嫌でこの商品が欲しい場合は注意。私はこの点を期待して買ったのに意味が無く返品申請した。買う前に販売業者にキー配列を問い合わせする事をオススメする。

3.06.2020

M**R

Not bluetooth, slow trackpad

This is wireless USB, not bluetooth (or maybe they sent me the wrong thing).It should work okay for the TV computer, but definitely not a good keyboard for regular use. Very squishy and the trackpad is _very_ slow to respond even on the highest setting.

15.06.2020

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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Display Size	3.5 Inches
Compatible Devices	Laptop
Color Name	Black
Wireless Comm Standard	2.4 GHz Radio Frequency
Batteries Included	Yes
Batteries Required	Yes
Brand	Logitech
Manufacturer	Logitech
Item Model Number	920-003070
Model Year	2011
Included Components	Wireless Receiver
Operating System	Windows
Special Features	Trackpad
Connectivity Technology	wireless
Product Dimensions	13.59 x 35.31 x 2.39 cm; 360.04 g
Item Weight	12.7 Ounces

Logitech Wireless Touch Keyboard K400 with Built-In Multi-Touch Touchpad, Black 並行輸入

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