To activate, twist backing clockwise. To deactivate twist counterclockwise.- Piece attaches magnetically. – To attach, remove magnet on back of the piece. Hold magnet behind shirt (or desired location) and attach piece on opposite side. Width: 1.0 in. – Height: 1.75 in LED Colors: Red, Green and Blue Batteries: Includes 2 replaceable CR927 batteries. – Weight: 0.02 LB
