TIVDIO RT-4504 FM Dual Alarm Clock Radio with USB Charging for Smartphones Battery Backup LED Display Sleep Timer Snooze(White) 12-hour-set;LED display offers four brightness settings (high, medium, low, off);Wake to FM radio or buzzer;Sleep timer;Snooze function Can charge simultaneously to three phone and other electronic devices by 3 USB power ports Automatic search and store FM Radio stations with 10 station preset memory Plays iPhone, iPod or other devices via line-in auxiliary 3.5mm Battery backup are used to backup the clock and alarm times when the AC adapter is disconnected or there is a power outage;2 x AAA batteries not included