Whether the source of patent:no colour:YR-04-dark gray Support customization:stand by Bluetooth protocol:5.0 Transmission range:10 meters Soundtrack:stereo Print LOGO:can Whether single or double ear:Bilateral stereo Occasions for gifts:Public relations planning Features:Multipoint connection How to use:Head-mounted Mold type:Private model Whether it is a dedicated source of cross-border export:Yes
