DESCRIPTION Color Display & LED backlight Good use on the desk or bedroom can see clearly in the dark when pressing the light button Time: 2 modes(12 hours/24 hours) are available. Digital Thermometer and show as centigrade or Fahrenheit Alarm and snooze function Temperature/humidity display: humidity range: 20 % RH-99%RH; Temperature range: 0C-50 C/32F-122 Calendar: (2001-2099 year)Max/Min temperature and humidity record Power supply: 3*AAA Batteries (Not included)Size: 13.8 x 9 x 5.1cm(approx)Color: black weight: 155 weight included package: 192g How to use: 1: setting the time Press and hold the mode for 3 seconds to enter the time setting mode The hour digits are blinking and can be set by pressing UP or Down for setting hoursPress mode again, then use the same way to set minute2: setting the alarm Press the mode to view the alarm timepress mode hold for 3 seconds to enter the alarm setting mode The hour digits are blinking and can be set by pressing UP or Down for setting hours the same way to set minute3: setting the calendar Press the mode to view the calendar press mode hold for 3 seconds to enter the calendar setting mode. The year digits are blinking and can be set by pressing UP or Down to set the year Use the same way to set the month and the day: Alarm on/off press up to turn the alarm on or off 5: Max/min Press the max/min to view max temperature and humidity record. Press the max/min again to view min temperature and humidity record Package included: 1 x Digital Clock 1 x English manual Read less.