Give yourself some extra peace of mind with this handy car-seat detection system that automatically alerts caregivers if a child is present in the car. Incremental alert levels warn if the child has been left unattended in the vehicle, and the system uses cloud-based systems to send messages and calls so you'll be covered regardless of your phone's signal or status. 0.7" x 8.2" x 7.1" Compatible with most car seats and boosters (sold separately) Powered by the Doona app Requires 2 CR 2032 batteries (included) Share one device with up to 3 users simultaneously Three alert levels: phone notification, phone call to smartphone and emergency contacts Set up to five emergency contacts in the app Polyester Spot clean Made in Italy