... voltage (12V ~ 24V) of the. The same PTC Straight hair can be used in the voltage between 100V ~ 230V, ... generally 20 ~ 40W, according to the size of straight hair varies; Rafah when the power is much greater than the ... is not recommended to use 12V AC, if the hair pulling power is 60W, 6V power supply current will ... the battery can not maintain the heat straight hair. ptc hair straightener, wave board