E343-M1 Surveillance earphone with M1 connector  earphone with surveillance clear air-tube earpiece and big noise-cancelling PTT . 

Suitable for Motorola radio GP68/88/88S/300/308,P040/080/110/1225/1225LS/2000,PRO1150/2150/3150,CP88/100/150/200,SP10/21/50,CT150/250/450/450LS,XTN-446/500/600,XU-1100/2600,CLS-1110/1410,LTS-2000,P-110, PR-400,PMR-446,CP040 EP450 DEP450 XirP3688