Cord-free Using Hair Strightener Comb: Cordless and portable hair straightener brush built-in 2500mAh rechargeable battery, a great replacement for traditional hair iron brush. It supports up to 20 minutes for cord-free run time. No need to find a socket, you could use it anytime and anywhere, super suitable for traveling, urgent dating and so on. NOTE: Don't use it while charging. , Anti-scald Design: Designed with anti-scald brush teeth, YAPOY hair straightening brush can effectively protect you from every angle, allows you to enjoy straightening and styling your hair without worries from getting burned or shocked by the heat. You can literally put the hair straightener on scalp and feel nothing.