Dimensions: 18.5 x 9.7 x 4.5 cm, 7.28 x 3.81 x 1.77 inches Clock Function: Displays hours and minutes, with 12/24-hour format switching. ●Date Function (2000-2099) ●Alarm Function: Set a daily alarm and snooze function. ●Temperature Function: Displays and switches between Fahrenheit and Celsius. Normal measurement range: -10°C to 50°C (14°F to 122°F), with a measurement error of approximately 2-3 degrees. ●Display Mode Selection: In temperature mode, press and hold the MODE button to switch between display modes. Cycles through time, date, and alarm display, or displays a fixed time. ●Brightness Function: Press the snooze button to adjust the brightness from high to medium to low to off. ●Auto Half-Brightness Function: Automatically dims the brightness from 6:00 PM to 5:59 AM, with a customizable half-brightness interval. ●LCD Projection Clock Function: Turns on and off by pressing the projection button. ●USB external power supply with power-off memory function (built-in CR2032 button battery (used to remember the time, button batteries cannot be used directly)). ●Keys have a beeping sound. Features: 1. 180° rotatable arm design allows for flexible adjustment of the projection angle, making it convenient to view time and temperature from multiple angles, whether in bed or on a desk. 2. Projection function clearly displays the time and indoor temperature on the wall or ceiling, making it more convenient and comfortable to use at night. 3. Built-in high-precision digital temperature and humidity sensor displays the current ambient temperature in real time, helping you understand indoor climate changes. 4. Supports switching between time, alarm, and temperature projection, with simple operation to meet diverse living needs. 5. Modern and minimalist appearance with soft forlighting display, combining practicality and decoration, suitable for a variety of settings, such as bedrooms and living rooms. Includes: 1 * Desktop Projection Clock (color box + bubble bag + instruction manual + USB power cable (plug not included)) Note: Please allow slight dimensional errors (1-2 cm / 0.39-0.78 inches) due to manual measurement. Actual product received is subject to accuracy. Please allow slight color variations on different monitors.