Features:1. LED time display (12/24 hour system can be switched)2. Can display time, date, temperature, alarm clock3. The temperature measurement range is 0℃-50℃ (can be converted between degrees Celsius and Fahrenheit)4. Brightness automatic dimming function (the brightness is automatically reduced by 70% during the period from 7 pm to 5:59 am the next day, and the brightness is automatically adjusted to 100% from 6 am to 6:59 pm)5. Brightness can be adjusted manually (L0 gear-L03 gear manual adjustment)6.4 setting buttons7. Three groups of alarm functions AL1-AL2-AL38. LED screen display automatically time, date; temperature conversion (can also be fixed time display)9. Can be used on the desktop or on the wall10. The working power supply is DC5V direct current power supply (a button battery is included as a memory time and cannot be stored) Specifications:Material: Acrylic+ABSSize: 235*93*40mmTemperature range: 0℃ - 50℃(±5℃)Battery: CR2032 (for memory time when cut off power, Battery not included, clock is powered by USB cable) PackList:1 x LED clock (With box)1 x USB cable (Adapter not included)1 x User manual (Instruction picture is attached at the product description)