PRECISE TEMPERATURE CONTROL FOR PERFECT FERMENTATION: Our sourdough starter warmer are capable of a degree-by-degree temperature setting, with an adjustable range of 70-100°F , and are designed with heat compensation to minimize temperature errors in actual use. INTELLIGENT CONTROL, 0-24H TIMED AUTO SHUT DOWN/ON: The sourdough warming mat can be personalized for 0-24 hours of timing, automatic shut down/on; the indicator light shows red, the sourdough heating mat is in the working heating state, and when it reaches the set temperature, the indicator light changes to blue; so that you can see the working state of the sourdough heating pad at a glance. COMPACT & LIGHTWEIGHT SIZE, EASY TO STORAGE: The sourdough warming mat size is 5.4*0.9*7.1in, easy to store, conducive to tidy kitchen; the heating plate diameter is 4.5in, which can accommodate various sizes of sourdough starter jars, which can satisfy the needs of different types of kitchen baking（The product does not include fermented jars.） DURABLE MATERIAL, READY-TO-USE PLUG, ENERGY-SAVING AND POWER SAVING: The sourdough starter warmer is made of durable ABS material, which is long-lasting.The upgraded American-style plug delivers more stable power and enhanced durability. Ready to use right out of the box, it eliminates the need for additional USB adapters, streamlining your workflow. 12H AFTER-SALES SERVICE TO ENHANCE CUSTOMER EXPERIENCE: We are committed to providing you with the right product heater for a better customer experience. If you have any questions about this sourdough home or have any problems in the process of using it, please let us know and we will reply you within 12H to help you solve the problem. Size: 5.4*0.9*7.1 inches Net Weight: 10.5oz The white sour dough starter warmer is able to adjust the temperature degree by degree, the heating temperature range is from 70-100 degrees Fahrenheit, and it has done the heat compensation design to reduce the heat loss; there is a 0-24 hours timer shutdown function, and the red and green indicator light helps you to observe the sourdough warmer's working status; upgraded U.S. standard 2-pronged plug, able to be used directly without your extra preparation of the USB plug. A friendly experience for all your fermentation and kitchen heating needs.