Large LED display with big digits shows time, alarm, time memory and snooze, and can also display the temperature in °C or °F. - Three brightness levels: adjustable backlight for day and night use. Night mode helps reduce glare and can be turned off as needed. - Sound control: allows waking the display with sound while operating on battery power, suitable for night use. The screen automatically switches off after 16 seconds of inactivity. - Dual power supply: powered by USB cable or 3 AAA batteries (not included). It can also be powered by an external DC 5V adapter. Using the external power option with power saving helps extend overall life. - Power saving mode: when running on battery, the display closes after 16 seconds of no operation to save power, while time, temperature and previous settings remain stored. - Key functions: time display, alarm functionality, memory of settings, snooze/postpone function, and temperature display in both °C and °F. Use scenarios - Bedside clock in the bedroom: large digits for quick reading, temperature display, and quiet operation for a restful environment. - Desk or office: adjustable brightness and reliable time/alarm memory with battery or USB power options. - Dorm, travel, or power outages: operates on 3 AAA batteries or USB/adapter for flexible use, with power-saving mode to conserve energy.