Receiver with Acoustic Earbud (3.5mm Listen Kit) For Two Way Radio or Speaker Remote Shoulder Microphone Acoustic nipple earbud with transparent tube gives a discreet tactical look Excellent applications for security bodyguards police officer fireman military personnel FBI / CIA / secret agents security bouncers hospitality warehouse retail Universal Standard mono 3.5mm connector fits two-way radios, radio speaker mics, MP3 players and similar devices Works with MOTOROLA CP200, CP200 XLS, GP300, EP450, PR400, HMN9030, PMMN4050, PMMN4059, PMMN4069, RLN4941 Compatible with Kenwood speaker mic KMC-25 KMC-26 KMC-41 KMC-41M KMC-42WM and others