Press area just below the ON/OFF switch until gap appears. Gently pull apart the two halves. Place three AAA batteries in compartment. Align front and rear-edge grooves and snap halves back together.
Make adjustments so band is snug. For larger dogs, clip on the included band extension. Place band beneath existing collar or choke chain on double up part of band. PupLight® can also be attached to existing collar.
With PupLight® facing you, remove screw and hex nut. Rotate collar clip 180°. Place PupLight® on top of collar clip, aligning hinges. Reinsert hinge screw in round hole. Insert hex nut into hex hole. Attached light to elastic band.