Each model's four sensors are colour matched to the rear bumper in which they are mounted and they audibly monitor the proximity of objects unseen from the driver seat. The sensors have three warning tones, a slow repeating 'beep' as the car closes from around 1.5 metres to 90 cm from whatever object is behind it, a faster pulsing beep as it backs up to around 45 cm and then a continuous buzz for any closer proximity.
The volume of the warning tones is adjustable to the driver's liking. Hyundai Accessories kits use premium hardware and have wiring harnesses tailored for each Hyundai model so they simply plug into each car's original factory loom. As such, they are covered for the five years of Hyundai's industry-leading, fully transferable new car warranty. The recommended retail prices of the sensor kits range up to $520 for Santa Fe.