My new smartphone is very convenient.

Hand washing and wearing masks are important for the prevention of severe acute respiratory syndrome.

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 is a very excellent technician.

The advancement of science and technology has greatly changed our lives.