UKLISS 1.25 Thermal Brush 32 mm - Comb, Straight, Curly Hair User-friendly 3 in 1 Thermal Brush (400F) Create a Blowout Look Quickly NOTE: 3 in 1 Hot Hair Brush without Air!!! NOT A TYPE OF BRUSH BLOWS OUT HOT AIR. UKLISS round brush is a heated hair brush, used to pull straight and styled hair. Use a curl brush to create a voluminous hairstyle with ease. 30s Fast Heat-Up & Styling This round curling brush features a PTC heater that heats up quickly within 30 seconds, distributes heat evenly, reduces the risk of thermal damage and unevenness, and makes hair smoother and healthier. For safety reasons, the heat brush automatically shuts off after 30 minutes.