ExpertPower Heavy Duty Speaker Mic for Motorola BR950 GP140 GP320 GP328 GP329 GP338 GP339 GP340 GP360 GP380 GP640 GP650 GP680 GP1280 HT750 HT1250 HT1250LS HT1550 IP 55 Water and Dust Ingress Protection Over All Resistant Rating 360 Degree Back Clip, with 8 settings for user guides and designed for rugged use Durable, Reliable, Rugged, Impact Resistant-polycarbonated housing Casing for extended product life Large PITT (Push to Talk) Feature for easy over the shoulder communication 3.5 mm audio earphone jack for external ear piece for added privacy communication feature.