Material: metal + silent movement Color: black Alarm clock size: 4 inches (17*12.5*6cm) Battery type: 1 * AA 1.5V (not included) Operating voltage: > 1.4 V Field of application: living room, bedroom, kitchen, clinic, office, etc. Note: Please select the correct alkaline battery to use. Package contents: 1 * alarm clock 1. Loud alarm: The alarm clock features a loud alarm sound, ideal for heavy sleepers. Easy to use with simple controls for setting time and alarm. 2. Quiet operation: No ticking noise; the smooth sweeping second hand ensures a quiet environment for sleeping or working. 3. Good readability: 4-inch dial with high-contrast black and white numbers for clear time reading. 4. Night light function: Built-in LED light helps display the time in the dark. Press the light button to activate the illumination. 5. User-friendly design: Simple back panel layout with two knobs to set time and alarm, an alarm on/off switch, and a night light button for easy operation. Note: All measurements are manually taken. Please allow 1-3 cm variation. Due to differences in lighting and screen display, actual color may vary slightly from the image. Please refer to the physical product received.