Feature:1. A variety of charging methods, USB cable and 3 AAA batteries can be powered, with power saving mode, longer service life.2. The LED numbers are bright and clear enough to see the time in the dark.3. Quiet operation, will not disturb your sleep, suitable for home and office use.4. Multifunctional electronic clock, which can display time, date and temperature, to meet your different needs.5. When using battery power, can be voiceactivated, and the display can be turned on by clapping your hands, and it will automatically go out after 16s.Specification:Item Type: Electronic ClockDisplay Type: NumberDisplay Type: LEDBattery: 3 x AAA batteries/USB (delivered without batteries)Size: Approx. 6cm / 2.4in16cm / 6.3in1.8 ~ 2.5cm / 0.7 ~ 1in.Package List:1 x Electronic Clock1 x Data Line1 x User Manual