To activate your Blinkies, first pull out the paper tab, then twist the circular battery house clockwise. To deactivate, twist counterclockwise. Width: 1.0 in. – Height: 1.25 in – LED Colors: 1 Green, 1 Red, 1 Blue – Batteries: Includes 2 replaceable CR927 batteries. – Weight: 0.01 LB

Clasp Type: Safety Pin