Doona SensAlert Baby Car Seat Accessory: Infant Safety Alert System, Black, Polyester Material, Lightweight DesignSensAlert is the only child car seat alert with three levels of alert to keep your baby safe, so you don't leave them unattended in the car. The SensAlert sensors detect the child's presence on board and warn the parent if the child is left alone in the car. The alert system is triggered when the parent is away from the car (because the smartphone loses the Bluetooth connection with the sensors), and SensAlert will still detect the child on board. SensAlert uses a cloud alarm system to send messages and calls, so it does not depend on the phone's signal or status. Do Not Disturb Mode - Temporarily pauses alerts when using a car seat carrier or travel system, automatically resuming after the $99.00TargetDelivery: to Redlands ReportBuy!