The timing switch can not only control the light intensity of the light bulb, but also control the working time of the light bulb (optional 2H/4H/8H)1. Timing system: After pressing the red switch, the timing button can be pressed. Press once for 2 hours, then press again for 4 hours, and press the third time for 8 hours. You can set 8H before going to bed and 4H before going out to eat. When the time comes, it will automatically power off.2. Control light intensity: Press the plus sign to increase brightness, and press the minus sign to decrease brightness. We do not recommend rapidly increasing or decreasing brightness as it will shorten the lifespan of the heating lamp Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 111 hours Hope you have a pleasant shopping experience!