Rainproof 2-Pin Shoulder Remote Speaker Mic Microphone PTT For Motorola Radio PMR446 PR400 Mag One BPR40 A8 EP450 AU1200 etc 3.5 mm jack for external listen-only earpiece earphone. Talk and listen without ever HOLDING your radio! 100% High Quality New Item. Push-To-Talk button and microphone are located on the accessory for quick and easy use.