(wireless) transceiver; radio; walkie-talkie
cordless telephone; wireless telephone
radio room; wireless room
wireless-activated disaster warning system
radio equipment; facility that can transmit radio waves (as defined in Japan's radio law)
aeronautical radio; aircraft radio
radio (wireless) operator; radioman
wireless local area network; wireless LAN; WLAN
radio communication operator
government emergency radio system for disaster prevention and relief
radio call sign; radio call letters
software-defined radio; SDR
instruction via radio communication (on a driving school practice course; i.e. without an instructor in the passenger seat)