Material: metal + quiet movement Size of the alarm clock: 4 inches 17 * 12.5 * 6cm Battery type: 1 * 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 * 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 / off and the night light button to display the time in the dark, very easy to use.