SensAlert is a child car seat alert solution that detects when a child is on board and warns the parent (or emergency contacts) with three incremental alert levels if the child is left unattended in the car. SensAlert uses a cloud alarm system to send messages and calls, so it doesn't depend on the phone's signal or status. Specifications SensAlert uses up to 3 safety alert levels to guarantee your child’s safety in the car. Automatically connects to your smartphone via Bluetooth and operates seamlessly with other devices without interference. Easy to install and simple to use. Share one pad with up to 3 devices at a time. Set up to 5 emergency contacts. Removable washable cover. Compatible with most car seats and boosters. Notification indicating that the pad battery is low. CPSA, FHSA, CPSIA certified. Dimensions & Weight 8.2" x 7.1" x 0.7" 0.24 lbs. Compatibility Doona+ Doona X Most car seats and boosters