Strongly recommend against these. Got one during a Woot sale awhile back. The first one ran fast - so fast that it needed to be reset daily. The second one we received worked great for awhile, but now the alarm function doesn't work - which basically makes this just an incredibly cheaply made digital clock.
It's made of incredibly cheap plastic, the clock face is ~1.5x0.75 inches, and overall the item just comes across (build quality, components) as incredibly poorly made.
While I recommend the type of function this has (wake up color change), there are other products on the market that are similarly priced and are much higher quality.