Choose a station from 87.5MHz to 108.0MHz as you want and listen to your favorite FM radio station. The radio volume is L0 to L15 adjustable. Large clear LCD screen delivers not only the time and alarm time but also the indoor temperature, with nice blue illuminated jumbo digits. There are two USB ports at the rear of the clock, the USB IN port serves the purpose of powering it and an extra USB OUT Port can be used to charge your cell phones, tablets or other USB devices at your bed. Battery backup will sound the alarm and keep the correct time during a power outage, ensuring to wake you up at the set time the next day.