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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Description

⌨️🖱️ Control your digital domain—wireless freedom meets sleek design!

FREEDOM TO ROAM - Reliable 33-foot wireless range lets you control your laptop from across the room.
SEAMLESS NAVIGATION - Built-in large multi-touch touchpad for intuitive web browsing and media control.
ECO CONSCIOUS CHOICE - Carbon Neutral Certified, combining performance with sustainability.
PLUG AND PLAY SIMPLICITY - Tiny Logitech Unifying receiver ensures instant setup—just plug and play.
EFFORTLESS TYPING EXPERIENCE - Sleek, low-profile keys with bold characters for quiet, comfortable typing.

The Logitech Wireless Touch Keyboard K400 features 78 quiet, low-profile keys and a spacious 3.5-inch multi-touch touchpad, delivering a seamless typing and navigation experience. With a robust 33-foot wireless range and easy plug-and-play setup via the Logitech Unifying receiver, it’s perfect for controlling your Windows-based laptop or TV-connected device from the comfort of your couch. Certified carbon neutral, it’s a smart, sustainable choice for the modern professional.

Specifications

Material externo	Plástico
Dimensiones del artículo (largo x ancho x alto)	5,35"l. x 13,9"an. x 0,94"al. pulgadas
Color	Negro -
Temática	computación
Nombre de estilo	Moderno
Número de identificación de comercio global	10097855074925, 00097855074928
Contenido de la caja	Teclado, Extensor USB, Teclado., Pilas AA (2), Documentación del usuario, Receptor USB
UPC	801940483591 763615784962 808113020096 100177260532 804993513819 887589062540 689228594999 097855074928 640026652311 012303251324 097855077707 641438039110 790304486203 641438921743 640206663175 088021284425 337485728540 043396316591 666674965580 803982774187
Descripción del teclado	Inalámbrico
Fabricante	Logitech
Customer Reviews	4.3 4.3 out of 5 stars 11,498 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when('A', 'ready').execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( 'acrLink-click-metrics', 'click', { "allowLinkDefault": true }, function (event) { if (window.ue) { ue.count("acrLinkClickCount", (ue.count("acrLinkClickCount") \|\| 0) + 1); } } ); } }); P.when('A', 'cf').execute(function(A) { A.declarative('acrStarsLink-click-metrics', 'click', { "allowLinkDefault" : true }, function(event){ if(window.ue) { ue.count("acrStarsLinkWithPopoverClickCount", (ue.count("acrStarsLinkWithPopoverClickCount") \|\| 0) + 1); } }); }); 4.3 out of 5 stars
Usos recomendados para producto	Uso diario
Best Sellers Rank	#110 in Computer Keyboards
ASIN	B005DKZTMG
Número de modelo	920-003070
Marca	Logitech
Tecnología de conexión	inalámbrico
Número de secciones	1
Cantidad de botones	78
Soporte de color de retroiluminación del teclado	Un Solo Color
Idioma	Inglés
Fuente de energía	Batería
Dispositivos compatibles	PC, Portátil
Número de teclas	78
Orientación de la manecilla	Ambidiestra
Características del producto	Teclas de acceso rápido y teclas multimedia, Tecla de bajo perfil, Trackpad

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