The double water ions are deeply penetrated into your hair for lasting protection and a smooth shine. With tens of millions of negative ions, this hair dryer can keep the natural moisture in the hair while also effectively reducing split ends and frizz, thus improving hair strength and making it more resilient. The built-in condenser condenses the moisture in the air and two needle-shaped motors rapidly atomize it into tiny negative water ions. Through a separate cold-air channel, these ions are delivered directly to the hair, scalp, and root, which protects your hair from being damaged by excessive temperatures while also hydrating it. Inspired by the principle of aviation engines, Xiaomi Water Ionic Hair Dryer H500 is equipped with a DC high-speed motor with speed of 20,000 rpm and seven wing-shaped turbine blades, which generate airflow through squeezing the air out of a conical pressurized air duct. The highest airflow speed is 20m/s, allowing strong airflow to reach the root and dry your hair swiftly without any damage. The ultra-short cylinder is small and exquisite, making it a breeze to pack and carry when you're traveling for business or pleasure. Its compact and lightweight design won't tire out your arm after a blow-dry. The anodized aluminum alloy finish adds texture and attractiveness to the hair dryer. The glass bead thermal sensor can accurately detect the air outlet temperature 60 times per second, and adjust the airflow temperature in real time to avoid overheating your hair and scalp. Its hot/cold air alternating mode - hot air for quick drying, cold air for styling - not only protects the hair surface from getting scorched or damaged, but also moisturizes the ends and offers enough care for the sensitive scalp. The NTC smart temperature control automatically adjusts the time interval between hot and cold air based on the detected ambient temperature, so as to provide comfort for the head while also maintaining healthy scalp and hair.