EUC Tranquilo Soothing Mat, Size: large The Tranquilo Mat through its gentle vibrations gently soothes and calms babies by mimicking similar sounds and motions of the womb. Lightweight and compact. Mat is 12 in. wide, 23.5 in. long Includes removable, washable cotton cover Runs on 4 AA batteries (not included) Works well, used for one child for 2 months. No stains, no holes/tears From a pet/smoke-free home