Avantree Sacool, one Bluetooth stereo headset with build in mic; stylish design and water resistant for outdoor use. The high-fidelity stereo sound for music and crystal clear for talk. Long music time (3.5 hours) and talk time (4 hours) , Lightness (18g), comfort, security make the headset easy to carry and greatly enrich your life. Specification: Bluetooth stereo headset V2.1+EDR Chipset: CSR BC05-Multimedia single chip Support profiles: Headset, Handsfree, A2DP, AVRCP Operation range: Class 2, 10 meters Bluetooth stereo headset size: 36.2mm x 21.2mm X 29.7mm Bluetooth stereo headset weight: 18gWhat is in the box: Avantree Sacool Bluetooth stereo headset Micro USB charging cable 3 pairs of ear buds (different size) User manual Warranty card