This GLAMFIELDS Straightening Brush 2.0 ($42) includes a fast-heating ceramic plate and a digital display so you can see the temperature. The design features a swivel cord so you'll never get tangled while you're using it. Just make sure to use it on dry hair — it's not intended to act as a blow-dryer. All you have to do is comb it through your hair for transformative results. People love that the brush saves them time and gets their hair looking silky and straight.