... mono bluetooth headphone Series 1 High quality 2 Low cost 3 CE, FCC, RoHS BQB 4 Patented Products ... bluetooth headphone Series 1 High quality 2 Low cost 3 CE, FCC, RoHS BQB 4 Patented Products ... Main Features:1 High quality2 Low cost 3 CE, FCC, RoHS, BQB approval4 Patented Products5 ... , no echo2) Changeable faceplate style (BH006)3) CE (R&TTE, including EMC, LVD AND RF), FCC ...