Helmet Bone Conduction Headset, Vyvylabs V18

Noise Reduction: Enc, Version: V5.2, Transmission Range: 10M Frequency Range: 150Hz-20Khz, Playing Time: About 8 Hours Standby, Time: About 240 Hours, Speaker: Bone Conduction, Waterproof Grade: Ipx6, Battery Capacity: 250Mah, Charging Time: About 1.5 Hours, Charging Connector: Type-C