Electrohome USB Charging Alarm Clock Radio with Time Projection, Battery Backup, Auto Time Set, Dual Alarm, 1.2" LED Display for Smartphones & Tablets (EAAC475) High-speed USB charging compatible with all smartphones, tablets, mobile phones & mp3 players SelfSet technology automatically detects the correct time/date & WakeUp battery backup sounds alarm even during power loss Long-lasting battery backup immediately restores alarm & clock settings in case of power failure (lithium battery included) Large 1.2" LED display with 180-degree swivel time projection for walls & ceilings Digital AM/FM radio with phase-locked loop tuning & 20 station memory; Automatically adjusts to Daylight Savings Time & pre-programmable daily dual alarm with weekend cancellation