1. Compact and Portable: Being so small and light,this product does not take up much space and can be easily carried around. 2. When powered by a battery,the LCD screen dims to save power. Only 12 seconds after each press to turn on the LED backlight. 3. Durable Material: This product is made of high quality material,which is durable,long service life,firm and stable in use. Features 1. Time projection function,the projection distance is about 1-5m,and the projection can be rotated 180 degrees. 2. Color display screen 3. LED backlight 4. Humidity display Temperature display range 0C-50C/32F-122F Humidity display range 20 %RH-99%RH 5. Dates show 2011-2099 6. Maximum/minimum humidity display 7. Alarm/snooze function 8. The product is powered by 2 AA batteries or USB Note: This product does not include battery and USB cable plug. Size: 15*11*2.5 cm Product colour: black Number of pieces delivered: 1 piece