... hoursUsing:1, press down ” key” for 2 seconds, will turn on and light up (half of brightness).2, ... “top brightness”3, contact “key” again, all Led will start to flash.4 ,at any status after turn on, press ... down ” key” for 2 seconds, will turn off5, press down ” key” for 5 seconds over ... please telephone our company's sales outlets, and we will solve the problem for you as soon as possible. ...