Graco Pack 'N Play with Newborn Napper Elite Owner's Manual page 13

Vibration Unit
1. Open the battery compartment
lid by inserting a screwdriver the
slot. Insert one D (LR20) cell
battery (not included). Replace
lid.
2. Cord in bottom of bassinet.
3. Vibration must be fastened
tightly and centered on the
webbing strap to work properly.