Zařízení je na psacím stole.

Because after the preposition na when it means a location (on / on top of / at), Czech uses the locative case.

• dictionary form: stůl = table / desk
• locative singular: (na) stole = on the table / desk

So:

• stůl = the basic form
• na stole = on the desk

This is one of the most important things to notice in the sentence.

Na often means on when something is on a surface.

So:

• na stole = on the desk
• na zemi = on the ground
• na polici = on the shelf

In this sentence, na shows location, so it answers the question Where is the device?

Both words are in the locative singular because they belong together after na:

• stůl → stole
• psací → psacím

The adjective has to match the noun in:

• gender
• number
• case

So psacím stole means on the writing desk or more naturally on the desk.

Because Czech adjectives change their endings to agree with the noun they describe.

Here:

• noun: stůl = masculine inanimate singular
• case: locative singular
• adjective must match that

So:

• basic form: psací
• locative singular masculine/neuter: psacím

That is why you get na psacím stole.

Psací stůl literally means writing table, but in normal English that is usually just desk.

So:

• stůl = table
• psací stůl = desk / writing desk

In the sentence, na psacím stole is best understood as on the desk.

It is singular here.

Zařízení is a neuter noun. It can mean:

• device
• apparatus
• equipment
• facility, depending on context

In this sentence, it most naturally means device.

You can see it is singular because of the verb:

• Zařízení je = The device is
• plural would be Zařízení jsou only if the noun were plural, but this particular word usually has different context and structure when plural meanings are intended

Je is the 3rd person singular form of být (to be).

So:

• já jsem = I am
• ty jsi = you are
• on/ona/ono je = he/she/it is

Since zařízení is singular, Czech uses je:

• Zařízení je na psacím stole. = The device is on the desk.

Czech does not normally use articles like a or the.

So zařízení can mean:

• a device
• the device

And na psacím stole can mean:

• on a desk
• on the desk

The exact meaning depends on context. In many learning examples, English uses the because that sounds more natural in translation.

Yes. Czech word order is more flexible than English word order.

The neutral order here is:

• Zařízení je na psacím stole.

But other orders are possible, for example for emphasis:

• Na psacím stole je zařízení. = On the desk is a device / There is a device on the desk.

The meaning stays very similar, but the focus changes. Czech often moves information around to show what is already known and what is new or important.

A simple approximate pronunciation is:

zah-RZHEE-zeh-nee yeh nah PSAH-tseem STOH-leh

A few useful notes:

• ř in zařízení is a special Czech sound with no exact English equivalent
• í is a long vowel, so psacím and zařízení both have a longer ee sound
• je sounds roughly like yeh

If you want a slower breakdown:

• Za-ří-ze-ní
• je
• na
• psa-cím
• sto-le

Yes, you could say na stole if the context already makes it clear what kind of table you mean.

Compare:

• Zařízení je na stole. = The device is on the table.
• Zařízení je na psacím stole. = The device is on the desk / writing desk.

Adding psacím makes the meaning more specific.

It answers Kde? = Where?

• Kde je zařízení? = Where is the device?
• Je na psacím stole. = It is on the desk.

Because it answers a location question, Czech uses na + locative here.

Yes. If there is movement onto the desk, Czech usually uses the accusative after na.

Compare:

• Zařízení je na psacím stole. = The device is on the desk.

  • location
  • locative

• Dám zařízení na psací stůl. = I will put the device onto the desk.

  • movement toward a destination
  • accusative

This location-vs-movement contrast is very important with prepositions like na.