duì​jiǎng​jī

walkie-talkie

对讲机 (對講機) duì​jiǎng​jī
walkie-talkie noun
a portable, handheld two-way radio transceiver used for communication over short distances

Rescue team members carry walkie-talkies to stay in contact.

intercom noun
a fixed electronic communication system, often used for internal calls or building access control

He pressed the intercom at the door and asked the security guard to open it.

Frequency

Movie subtitles
5.16 per million appears in 2% of films
Written text
1.82 per million

Sources

Definitions
CC-CEDICT