A reusable gel warmer that can be heated in a microwave and provides a warming effect for approximately 40-50 minutes. - Product Name: Choion Gel Warmer - How to Use: Can be heated in a microwave - Warmth Duration: Approximately 40-50 minutes - Reusable: Can be used repeatedly Although it is new and unopened, please refrain from purchasing if you are sensitive to such things. Instant purchase is OK. No returns.