Features:  * Wireless sport In-ear Headphone、 140h stand-by time、 4-5h Talking time. * 10M connection distance from the straight line without obstacles. * Compatible with 99% Bluetooth devices、 mobile phone、 tablet、 computer. * Support the simultaneouse connection of two phones or computers. * Power display function for iso phone and a part of Android phone.  How to ues:  * Long press the button between the volume + and -、 when the blue light is on ( it means power on)、 do not loose your finger、 until the blue light and the red light flicker alternatly ( means the bluetooth turns on)、 then turn on the bluetooth of your phone or other bluetooth devices、 scan the device named Q1 and connect it. If you want to turn off the earphone、 just long press the same button until the red light on. * The simultaneous connection of two blue devices: when the earphone connects with the first bluetooth devices、 turn off the first bluetooth device. Then turn on again the bluetooth of the earphone、 and connect with the second bluetooth device. After that、 turn on the first bluetooth. Specifications:            General Specification             Brand         KESHI              Model         Q1             Color         Black、 Red、 Green、 White             Wearing Type         In-ear             Dimensions (cm\/ inch)         120*1.23*0.9cm           Technical Parameters             Stand-by Time         140h             Talking Time         4-5h             Charging Time         1-2h             Impedance         32!#!amp!*!Omega;             Battery  Capacity         65mAh             Charging Voltage         DC5V             Frequency Response         20-20000Hz             Bluetooth Version         4.1 version             Bluetooth Protocol         HFP \/ HSP \/ ACVRP \/ A2DP            Transmission Range         10M    Package  Included:                   1!#!amp!*!times; Earphone             1!#!amp!*!times; USB cable             2!#!amp!*!times; pairs of earmuffs             2!#!amp!*!times; cable clip