Negative Ion Thermal Brush: The barrel is not removable and has a negative ion function. Please note: This curling brush is only a hair heating tool, cannot dry your hair. Negative Ion Thermal brush-rose gold Negative Ion Thermal brush-pink Negative Ion Thermal brush-purple 196 Thermal Brush is the upgraded version of 186 Thermal Brush with some new features. 1. More temperature levels, now there are 5 temperature levels, (300°F- 330°F-360°F-390°F-420°F), you can choose the temperature level that suits you when you use it. 2. New temperature display, you can check what temperature you are using during use. 3. Dual PTC design for more even heating. 300°F——Soft Or Thin Hair 330°F——Dyed or Darked Hair 360°F——Slightly Curly Hair 390°F——Thick or Wavy Hair 420°F——Ringlet Curl or Coarse Hair Our universial voltage heated round brush with multiple temperature settings gives you more control over your styling process, enabling you to achieve the best results while minimizing damage to your hair. For negative function: Please choose the suitable temperature for your hair type and operate according to the instructions. Styling effect is affected by hair quality and operation method, all video effects are for reference only. Before ordering or when you use it, welcome to contact our store customer service at any time, we will do our best to recommend the suitable product for you, and help you get the detailed use method of the product.