展开It features breakthrough patented tri-zone technology with six intelligent sensors that guarantee the optimum curling temperature of 365f across the barrel for long-lasting, healthy-looking curls with up to two times more color integrity. It features breakthrough patented tri-zone technology with six intelligent sensors that guarantee the optimum curling temperature of 365f across the barrel for long-lasting, healthy-looking curls with up to two times more color integrity. The ultra-zone technology is the latest breakthrough in heat styling which guarantees homogeneous heat across the whole barrel, allowing consistent curls in just 5-8 seconds.