Icom HM-159LA Heavy Duty Speaker Microphone w/ Alligator Clip Heavy duty speaker mic with alligator clip Listen only port (3.5mm) Works with Icom F11, F14, F33GT/GS, F43GT/GS, F3021T/S, F3023T/S, F4021T/S, F4023T/S, F3001, F4001, F3003, F4003, F3011, F4011 F14/S, F24/S, F43TR, F3101D and F4101D series radios