Advanced BT V.5.0 Technology Its transmission distance is up to 20meters CVC 6.0 Broadband Noise Reduction IPX6 Waterproof and Comfortable in Ear Specification Color Black Model Number Lenovo HE05 Black Batteries 1 Lithium Polymer battery Special Features Earbud, Neckband, In-ear Dimensions 22 x 3.1 x 16.5 cm Item Weight 136 Grams