... the twinkle dress .The on/off is a switch for power. 1) when you push the ... slowly. this time, if you push the button switch, the flashing frequency will be rapid. but this ... . this time , if you push the button switch, the dress will be flash. but the frequency ... screw, open the battery box.3) Romove the old battery, then put the new battery in the right position4) close the battery box, turn the screw ...