[FM Radio and Sleep Timer] Frequency range: 87.5-108MHz, allowing you to easily tune into your favorite radio stations. The sleep timer function can be set from 15 to 90 minutes, ideal for listening before bedtime.[Customizable Alarm Clock] Dual alarm settings with options for weekdays (Monday to Friday), weekends (Saturday to Sunday), or daily (Monday to Sunday) to suit various schedules. Seven different alarm tones are available, and you can set your preferred FM radio station as the alarm sound. Includes a snooze function for an extra 9 minutes of rest.[Dual USB Charging Ports and Battery Backup] When powered via AC adapter, the dual USB ports allow charging of smartphones, tablets, or other 5V devices. When using battery power (3 x AAA, not included), the clock continues to operate during power outages or while traveling.[6-Level Adjustable Brightness] Press the SNOOZE/DIMMER button to adjust the screen brightness across six levels (0%, 20%, 40%, 60%, 80%, 100%) in both AC and battery modes. In battery mode, the LCD screen automatically turns off to conserve power and wakes when any button is pressed.[Indoor Temperature Display with 12H/24H Format] Accurately displays room temperature in either Celsius or Fahrenheit. Supports both 12-hour and 24-hour time formats for user preference.