The ground breaking king ii ats actively watches over your child throughout their journey it checks correct harness tensioning as you leave it adjusts as you go dynamically retracting the harness to keep tension just right and it monitors throughout alerting you of any issue which means you can keep your eyes on the road aheadproduct highlightsactive tensioning system harness indicator tells you with light and sound when you have harnessed your child to the correct tension harness tens