Used once. Baby preferred our swing instead which had a similar vibration setting. Product details: Smart vibrating mat helps your baby sleep better & safer since your baby lies flat on her back (not on an incline like swings or rockers). Mat activates your baby’s natural calming and sleep reflexes by mimicking the sounds & motions of the womb; Customize to your baby’s liking with 4 vibration levels & 4 heartbeat modes. Lightweight and portable -- Rolls up for on-the-go; Perfect size for cribs/bassinets/activity mats. Includes water-resistant interior lining and soft, removable & washable polyester/spandex cover. Smart mat has 5 timer settings (15, 30, 45, 60 min, continuous), connects to your phone with Bluetooth, uses 4 AA batteries (not included) that should last up to 50 hours depending on use. App includes battery life indicator. Award-winning. Featured on Shark Tank & Semi-Finalist in National Sleep Foundation's 2019 Sleep Tech awards. Pediatrician Recommended. Ideal for 0-12 months. Dimensions: 11" X 23" X 3/4" (Flat) + 11" X 5" X 5" (Rolled); 1 lb