Features:<br /><br />* Bluetooth 4.1 version， CSR imported chips， 10mm speaker provide powerful bass<br />* Comfortable and lightweight design fits perfectly to your ears.<br />* Sweatproof design， the earbud will not slip out and uncomfortable while running， jogging， or exercising.<br />* High quality polymer 80mAh battery， with energy-saving circuit design， long stangby time.Specifications:General Specification  Brand  NABOLANG  Model  BT-11  Color  Black， White  Wearing Type  In-earTechnical Parameters  Connectivity  Wireless  Receive Sensitivity  95dB  Impedance  16&amp;Omega;  Frequency Response  20-20000Hz  Battery Capscity  80mAh  Bluetooth Version  4.1  Bluetooth Protocol  HFP / HSP / A2DP / AVRCP Transmission Range  within 10MPackage  Included:  1&amp;times; Earphone  1&amp;times; Charging cable  1&amp;times; Custom earbuds and ear-hook  1&amp;times; User manual<br /><br />