Our lives have changed significantly due to the new coronavirus.

I bought a new headphone.

I bought new earphones.

I would be in trouble without my mobile phone.

He started his speech using a microphone.

I talked to him through the intercom.

He has problems with executive functioning.

His high-functioning smartphone greatly helps his daily life.

This high-functionality smartphone has many convenient features.

The doctor recommended a blood test to check my liver function.