У меня есть новые наушники, и я пользуюсь ими каждый день.

In everyday Russian, possession is usually expressed with the pattern У + genitive + есть.

So:

• У меня есть новые наушники = literally By me there are new headphones
• natural English translation: I have new headphones

This is the normal, neutral way to say that you have something.

Я имею does exist, but it sounds formal, bookish, or legal in many contexts. Native speakers usually do not use it for ordinary possession like clothes, pets, or headphones.

So for normal speech:

• У меня есть машина. = I have a car.
• У него есть сестра. = He has a sister.

Because the structure У меня есть... requires the preposition у, and after у, the pronoun goes into the genitive case.

So:

• я = I
• меня = me / of me (genitive or accusative form, depending on context)

Here it is genitive because of у:

• у меня = at me / by me

This whole phrase expresses possession.

Compare:

• я = I
• у меня = I have / at my place / with me

Examples:

• У меня есть книга. = I have a book.
• У меня нет времени. = I don’t have time.

That is a very common question. Russian usually does omit to be in the present tense when linking a subject and a description:

• Он врач. = He is a doctor.
• Она дома. = She is at home.

But in У меня есть..., есть does not work like the English verb is/am/are. Here it means something like there exists / there is.

So:

• У меня новые наушники can mean something like As for me, I have new headphones or I’ve got new headphones, often with a slightly descriptive feel.
• У меня есть новые наушники clearly emphasizes the existence/possession: I have new headphones.

In many real conversations, есть is omitted if possession is obvious from context, but including it is completely correct and often helpful for learners.

Yes, наушники is normally a plural-only noun in Russian, just like English headphones.

You usually do not say a singular form when talking about the item as a whole. Russian treats it as something with two parts, so the plural is standard.

That is why the adjective is also plural:

• новые наушники = new headphones

Other Russian nouns often used this way include things like:

• ножницы = scissors
• брюки = trousers/pants
• очки = glasses

So even if you think of it as one object, grammatically it is plural.

Because adjectives must agree with the nouns they describe in gender, number, and case.

Since наушники is plural, the adjective must also be plural:

• masculine singular: новый
• feminine singular: новая
• neuter singular: новое
• plural: новые

So:

• новые наушники = new headphones

If the noun were singular masculine, then you would use новый:

• новый телефон = new phone

The verb here is пользоваться, which means to use in the sense of make use of something.

Its first-person singular form is:

• я пользуюсь = I use

The -сь ending shows that this is a reflexive verb. In Russian, many verbs naturally come with -ся / -сь as part of their dictionary form. You should learn пользоваться as a whole verb, not as пользовать + something.

So:

• dictionary form: пользоваться
• I use: я пользуюсь
• you use: ты пользуешься
• they use: они пользуются

In this case, the reflexive ending is just part of how the verb works grammatically.

Both can often be translated as to use, but they are not always used in exactly the same way.

пользоваться

This often means to use regularly, to make use of, or to rely on something. It is very common with objects like:

• пользоваться телефоном = use a phone
• пользоваться словарём = use a dictionary
• пользоваться наушниками = use headphones

использовать

This often means to utilize, to employ, or to use for a purpose. It can sound a bit more neutral, technical, or purposeful.

In your sentence, я пользуюсь ими каждый день sounds very natural because it describes regular everyday use.

So the sentence means not just I use them, but more like I use them regularly / I make use of them every day.

Because the verb пользоваться requires the instrumental case, not the accusative.

So after пользоваться, the object must be in instrumental:

• пользоваться чем? = to use what?

For the pronoun они (they / them), the instrumental form is:

• ими = by them / with them / using them

So:

• я пользуюсь ими = I use them

If you said их, that would be the accusative/genitive form, and it would be wrong with пользоваться.

Compare:

• Я вижу их. = I see them. → accusative
• Я пользуюсь ими. = I use them. → instrumental

Yes. This sentence is a good example of several different case patterns.

1. У меня

• у requires the genitive
• меня is genitive here

2. новые наушники

• This is the thing possessed
• In this construction, it stays in the nominative
• наушники is plural nominative
• новые agrees with it

3. я

• This is the subject of the second clause
• It is in the nominative

4. ими

• пользоваться requires the instrumental
• so они becomes ими

5. каждый день

This expression is commonly used adverbially and is usually analyzed as:

• каждый = accusative masculine singular
• день = accusative masculine singular

So the sentence contains genitive, nominative, instrumental, and accusative patterns all at once.

Каждый день means every day, and Russian often uses this kind of time expression without a preposition.

It is typically treated as an adverbial expression of time. In practice, learners should memorize it as a set phrase:

• каждый день = every day
• каждую неделю = every week
• каждый год = every year

With день, the form looks like the accusative singular:

• nominative: каждый день
• accusative: каждый день

Because день is masculine inanimate, nominative and accusative look the same.

So even though there is no preposition, the phrase is completely normal and very common.

Because the sentence describes a habit or repeated action:

• я пользуюсь ими каждый день = I use them every day

In Russian, habitual or ongoing actions are usually expressed with the imperfective aspect.

The verb пользоваться is imperfective, which fits perfectly with:

• repeated actions
• regular habits
• general processes

A perfective verb would not fit naturally here, because every day suggests repeated use, not one completed action.

Yes. Russian word order is flexible, and different orders can change the emphasis.

The original sentence:

• У меня есть новые наушники, и я пользуюсь ими каждый день.

This is neutral and natural.

Other possible versions:

• У меня есть новые наушники, и каждый день я пользуюсь ими.
• Новые наушники у меня есть, и я пользуюсь ими каждый день.
• Я ими пользуюсь каждый день.

These can sound more emphatic, more contrastive, or more context-dependent.

For a learner, the original order is the safest and most neutral.

Yes, sometimes it can.

Russian often drops subject pronouns when the verb form already makes the subject clear.

So you may hear:

• У меня есть новые наушники, и пользуюсь ими каждый день.

This still means I have new headphones, and I use them every day, because пользуюсь clearly shows I.

However, including я is also correct. It can make the sentence clearer, especially for learners, and it may add slight emphasis.

So both are possible:

• ...и я пользуюсь ими каждый день.
• ...и пользуюсь ими каждый день.

The version with я is often easier to understand if you are still learning.