I bought this alarm clock because it seemed like it had all the feature I wanted: Radio, USB port, battery backup, and blue numbers were a superficial bonus. The price was fair enough.
Unfortunately, the quality control on this product is terrible. The first one I ordered, the USB port did not work. I requested an exchange, and on the new one, the battery backup does not work. Despite putting batteries in the clock, the time and everything resets when unplugged. At least I have the USB charger which is more important to me.
I'm not going to return it because it's not worth the hassle to me, but if I were you, I'd choose a different clock. Two is a small sample size, but I'm not impressed that both units had a different defect. Sound is also not all that great from the radio, and the antenna is pretty weak.