Cybex aton belted base aton belted base is easy to fit with one click easy to get baby in and out of the car with no seat belt to obstruct and a simple lockunlock turn lever to install and release base features compatible with new aton models simple lockunlock turn lever to install and release base adjustable support leg simply click and go no need to use the seat belt once the base is installed green indicator to show correct car seat fitting easy to get baby in and out with no seat b