[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, enabling you to listen to the radio before falling asleep. [Customizable Alarm Clock] Dual alarm settings with options for weekday (Monday to Friday), weekend (Saturday to Sunday), or daily (Monday to Sunday) alarms to suit various schedules. Seven different alarm tones are available, and you can set your preferred FM radio station as the alarm sound. The snooze feature allows an extra 9 minutes of sleep with a simple press. [Dual USB Charging Ports and Battery Backup] When powered via AC adapter, the dual USB ports provide charging for phones, tablets, or other 5V devices. In battery mode, the clock operates using 3 x AAA batteries (not included), ensuring continuous function during travel or power outages. [6-Level Adjustable Brightness] The display brightness can be adjusted in six levels (0%, 20%, 40%, 60%, 80%, 100%) by pressing the SNOOZE/DIMMER button, in both AC and battery-powered modes. In battery mode, the LCD screen automatically turns off to conserve power and wakes up when any button is pressed. [Indoor Temperature Display with 12H/24H Format] Displays real-time indoor temperature in either Celsius or Fahrenheit. Supports both 12-hour and 24-hour time formats for user convenience.