FM Radio & Sleep TimerFrequency range: 87.5-108MHz, you can easily find your favorite radio frequency. Also, with the sleep timer (15-90 minutes), you can listen to your favorite radio frequencies before falling asleep. Customizable Alarm ClockDual alarm clock with weekday (Monday to Friday), weekend (Saturday to Sunday) or daily (Monday to Sunday) functions to meet most of your family's needs. 7 ringtones to meet all your needs, choose your favorite radio frequency as alarm tone. You can use the snooze function to sleep for an additional 9 minutes. Dual USB Charging Ports and Spare BatteryDual USB charging ports can charge your phone, tablet or other 5v electronics in outlet powered mode. In battery power mode, with 3*AAA (not included), the clock can keep working when you are out and about. 6 Levels Adjustable BrightnessIn battery power mode and power cord mode, press the SNOOZE/DIMMER button to adjust the brightness (0-20%-40%-60%-80%-100%). And in battery power mode, the LCD screen will automatically turn off before pressing any key to wake the screen to save battery power. Temperature Detection and 12 Hours/24 HoursIt can detect the indoor temperature in time. Both Celsius and Fahrenheit units are available. Both 12H and 24H modes are available.