Check the listing for details. Hot Air Optical Eyeglasses Frame Warmer Frame Heater Temperature Adjustable 110V. Color: white, Condition: New. Listed at 55.85 USD. Features&Highlights: ✪High Efficiency: The Product Adopts High Quality Heating Line, Which Can Reach The Highest Temperature In 2 Minutes. In Addition, It Has Constant Temperature Control To Ensure That The Frame Will Not Be Damaged. ✪Adjustable Temperature: The Product Has An Adjustable Temperature Range Of 50-100℃ (122-212℉) To Meet Your Heating Needs. Turn The Temperature Control Knob To The Bottom And Wait Patiently For 1-2 Minutes Until The Temperature Reaches 212℉. ✪Widely Use: The Product Is Suitable For Non-Metallic Glasses Frame, Resin, Plate And So On. It Softens Frames From Heat Damage, Then Adjusts And Repairs Them, And Is Widely Used By Opticians And Optical Processing Industries. ✪Thoughtful Design.