Product Material: metal and quiet movement Size of the alarm clock: 4 inches 17 x 12.5 x 6cm Battery type: 1 x AA 1.5V (not in Scope of delivery) Operating voltage:> 1.4V Application: living room, bedroom, kitchen, clinic, office, etc. Note: Please select the suitable alkaline battery for use. Package included: 1 x alarm clock 1. Loud alarm: The alarm clock is very loud, you definitely can't overhear it - also perfect for deep sleepers. Very easy operation with only two buttons for setting the time and alarm time. 2. Noiseless: No annoying ticking, the creeping second hand creates a quiet sleeping and working environment. 3. Good legibility: 4 Inch large dial, stereoscopic numbers, black and white dial has a good contrast, so that the time can be clearly read. 4. Night light function: The pleasant lighting helps you to read the time in the dark . Simply press the light button to activate the LED lighting of the dial. 5. User-friendly design Our wind-up clock is easy to use, there are only four buttons on the back: Two rotary knobs for setting the clock and the alarm, an alarm switch to turn on or off and the night light button to display the time in the dark, very easy to use.