(Before using this product for the first time.) [A] Simultaneous press & hold the function keys of Base and Headset 4 seconds more then release the buttons, the indicator flashes green light change to green light when the fink code has completed a setting, [B] Press the function key of Headset again, to tum-off the indicator green light ; the indicator green light change to flash green light on the Base. The Base enter into standby made. 3.Setting the Mobile Phone; [A) Please set-up Mobile-phone in “Auto.