[. . . ] [. . . ] Remember to set the ID when you replace the batteries or your keyboard do not work properly. Please follow below steps to complete the necessary IDSetting process for your cordless mouse and USB dongle receiver. Once the ID setting process is completed, the receiver LED will light off. If the mouse or keyboard doesn't work properly, please remove the USB dongle receiver from computer's USB port, then repeat do step 3 to step 6 again. [. . . ] [. . . ]