Attention: digital wall clock better work with electric power supply. Due to the high power consumption of LEDs, the clock doesnt work on batteries alone. Batteries in this clock is for emergency use to time and temperature after power failure. LED digital wall clock, with highly recognizable 2.6-inch numerals, more obvious than wall clock numerals, you can see the time at a when and where display effects, in addition to the time, you can also see the indoor temperature and humidity and the day of the week, and set two alarm clocks according to your needs to meet your workday and daily needs LED digital wall clock with built-in automatic brightness adjustment by time period, in addition, there is a manual touch area on the top of the wall clock, and four-level backlight settings can be manually set The 2-meter-long USB power cable meets most usage scenarios. There are 2 convenient positioning holes on the back, which can be hung by or hooks. Style:A green numbers Colour:black Material:ABS Size:26 x 3.7cm Package Contents: 1 * Digital Wall Clock 1 * USB data cable Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.