There is provided an optical engine assembly including an active unit and a transmission unit. Said blank comprises sidewalls, raised edges or portions of raised edges on two opposite sides of an upper portion, and a lower wall forming the bottom of the case. The water mist is produced by high frequency pressure waves or ultrasonic waves of predetermined or variable frequency, including frequencies which may exceed 2. When the apparatus is driven, the second TFT is turned off. 035 parts by weight of volatile compounds and processes for its preparation. Adjustment buckles may include two or more silicone coated pads having holes for threading the cords of the swim top.