Attention: digital wall clock better work with electric supply. Due to the high consumption of LEDs, the clock doesnt work on batteries alone. Batteries in this clock is for emergency to restore time and temperature after 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 glance 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 -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 cable meets usage scenarios. There are 2 convenient positioning holes on the back, which can be hung on the wall by nails or sticky 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 products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.