The U.S. National Highway Traffic Safety Administration has cautioned parents about the unreliability factor with aftermarket devices meant to offset heat-stroke deaths among children left in cars.
The technologies which are designed to spot children left in hot cars are tough to install correctly and can give out false alarms.
"While we feel these devices are very well-intended, we don't think they can be used as the only countermeasure to make sure that you don't forget your child behind in a car," the safety administration warned.
Heat stroke is the major cause of non-crash vehicle-related deaths in the U.S. for children under 14. Nearly 500 children have died after being left unattended in vehicles between 1998 and 2009, according to San Francisco State University research.
"The devices required considerable effort from the parent to ensure smooth operation," Some of the devices turned on and off or beeped during the drive. We're concerned about the frustration and source of distraction this might lead to."
These devices are not completely defect proof and one cannot afford to take chances with children.