Ailunce shoulder speaker mic compatible with Motorola GP328 PLUS,GP338PLUS,GP344,GP388,GP644,GP688,EX500,EX600,PRO5150Elite,RPV3000,RPV3600,RPU3000,RPU3600,EX600-XLS, GL2000, EX560 Compatible with Ailunce HD1 HD2 HA1G Retevis RT29 RT48 NR30 RB23 RT29D RT47 RT47V RT87 RT83 RT82 RB46 two way radios The metal clip of shoulder speaker mic is on the back; strong and can rotate 360 degrees Louder speaker and microphone units provide clear audio communication Ailunce speaker mic; sealed to IP67 standards; waterproof and dustproof speak mic; suitable for outdoor use