3D LED Digital Alarm Clock Three dimensional Wall Clock HangingFunctionTwo display modes: 1. Only display the time. 2. Time, date, temperature cycle displayAdjustable brightness mode: 1. Three speed automatic sensitivity; 2. Three speed manual brightness adjustment; 3. Display can be turned off; 4. Sleep mode, four speed sensitivityMemory mode: 1. With memory battery installed, time can be remembered without power supply. 2. Without power and battery, remember the previous clock and various setting modesAlarm