Thispair of mina a8 1-to-2 Bluetooth 4.0In-ear HandsfreeHeadsets with Microphone is extremely suitable for outdoor sports such as jogging， cycling， mountaineering， etc. Designed into 1-to-2 style， it can meet your different needs under different occasions. Adopting superb Bluetooth smart chip， this pair ofheadpsets ensures stable Bluetooth receiving. It support hands-free calls function with a built-in high sensitivity microphone. Besides， it is energy-saving and low power consumption for economical use. Furthermore， it allows you to control music or voice volume easily.                                    Features             High-quality audio and excellent tone quality<br> With a microphone for hands-free calls function <br> Adopt ultra light head band for comfortable wear<br> Smart noise reduction and echo elimination ensure clearer communication<br> Support two mobile phones or devices with Bluetooth simultaneous connection<br> With in-ear design   <br>                                                            Specifications             Bluetooth Version     Bluetooth 4.0      <br> Bluetooth Protocol     HFP V1.6/ HSP V1.2/ A2DP V1.2/ CVC Version 6.0    <br> Frequency Range     2.4GHz    <br> Distance     393.7 " / 10m     <br> Talk Time     5 Hours    <br> Standby Time     120 Hours     <br> USB Cable Length     41.14 " / 104.5 cm     <br> Dimensions     (1.22 x 1.02 x 0.83) " / (3.1 x 2.6 x 2.1) cm (L x W x H)    <br> Color     Silvery White     <br> Weight     0.18 oz / 5 g     <br>                                                             Package Includes            1 x Bluetooth Headset<br>1 x USB Cable<br>1 x Ear-Hook<br>1 x Headset Line<br>1 x  Manual<br>