[Mini Travel Digital Alarm Clock]Time and Temperature display, 12/24 hour switchable, alarms, snooze, temperature (Celsius/ Fahrenheit) display, 2 level smart brightness dimmer design, bright enough in the daytime, automatically dimmed at 18:00-7:00, soft light will not hinder going to sleep in night. [Snooze Function] Press the snooze button to stop the buzzer and no need opening eyes, the LED digital clock will ring again after 5 minutes. [USB & Battery Power]This alarm clock comes with a USB power cable (NOT include power adapter), you can also use 3 AAA battery(NOT include battery) as a wireless alarm clock, 2 power supply way for more convenient use. ATTENTION: When plugged with USB cable, the LED light can be on always. When powered by batteries, the LED will light on for 5 seconds when your press the button, then turning the screen off automatically. [Easy Use and Simple Design] Simple alarm clock with clearly marked button on back, you will hardly need instructions when setting the time or alarm. Easy for kids, seniors and the elderly, suitable for living room, bedroom, study and travel [TIPS] 1. The screen CAN'T always bright when using the battery. 2. This is a SMALL STYLE design clock, please kindly note the size is 3.9 inch * 1.9 inch * 1.1 inch, Please 'T imagine the size according to the picture. Colour: black Material: ABS Size: 10*5*3cm Package Contents: 1 * alarm clock 1 * USB data cable 1 * instruction manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.