Are batteries required to operate TruBliss products or do they plug into the wall?

* The  Sweetli Deluxe Bassinet  requires 4 AA batteries to activate the Play2Sleep Mobile. Be  sure to use 4 new batteries of the same type. * The  Journey 3-in-1 Bassinet  requires 3 AA batteries to activate the music, vibration and night light. Be sure to use 3 new batteries of the same type. * The  Evi Smart Ba…