Features: 1:The latest Bluetooth V4.1 technology2:International brand CSR chip3:High capacity batteries are used for a long time5:Designed for sports, wear solid6:Subwoofer stereo sound7:High-definition microphone support calls8:C10 Fashion Bluetooth Sports Headphones Packaging includes: Bluetooth Sports Headphones 1pcs headphones1pcs brochure1pcs Charger Line2 pairs of earplugs