HANDS-FREE CURLS: Add hands-free curls, waves, and volume to hair. This set of 12 ionic rollers heats fast and evenly while promoting shiny, healthy volume that is totally hands-free. LONG SET: 12 Long Rollers (5.25" L x 1" W) meant for shoulder-length to long hair. STAY HOT OFF-BASE: Each roller houses an individual PTC heater and reaches 230°F in 3-5 minutes. Rollers are topped with a Temperature Indicator Dot to exhibit temperature. Rollers remain hot off-base for 20 minutes. SHINIER, HEALTHIER HAIR: Calista Fusion Technology combines ionic and ceramic properties for less frizz and more shine. STYLIST CREATED: Calista was founded by Maria McCool, a pro stylist creating styling tools that make doing your own hair easy, safe, and fun. Customer-inspired and stylist-created, Calista makes high-quality hair products and time-tested styling tools. We believe in simplifying the hairstyling process, embracing your hair at every age, and giving you consistently beautiful results. Calista founder and creator, Maria McCool, is a professional hairstylist with the goal to give you the tools, knowledge, and resources to be your own stylist anytime, anywhere. The Calista Ion Hot Rollers create maximum body and curl. This set of 12 ionic rollers heats fast and evenly while promoting shiny, healthy volume that is totally hands-free. Includes 12 claw-style clips for easy styling. Rollers reach 230°F in 3-5 minutes and remain hot off-base for 20 minutes. Ionic Technology promotes shiny, healthy hair. Short Set Size: 6 Short Rollers (2.5" L x 1" W), 6 Medium Rollers (2.5" L x 1.25" W). Long Set Size: 12 Long Rollers (5.25" L x 1" W). Base Size: 10"L x 6.5"W x 2"H. Use on dry hair only. Place rollers onto charging base. Plug unit into wall outlet. Turn power button to the "on" position and allow three to five minutes for rollers to heat. Do not place clips on rollers while heating. Rollers are ready to use when indicator dot on top of each roller turns from black to red. If the indicator dot does not turn red, readjust or turn the roller to ensure that it is firmly connected to the base. Style hair. Use our styling guide to create versatile looks. Dual Voltage device.