SharpDigital Alarm Clock with Keyboard Style Controls, Battery Back-up, Easy to Use with Simple Operation, Black Case with Red LED Display

I was looking for a simple desk clock that runs of AC and uses the 60 Hz mains frequency as a time base. The reason for the latter is because the electricity company keeps this really accurate, you will never have to correct the clock (as is often the case with clocks having an internal quartz reference). Quartz based clocks always drifts over time, not so for this clock. Also, those atomic clocks (as an alternative) were not an option for me, as the NIST radio signal for that (from Ft Collins, CO) is too weak where I live. Apart from the fact that those clocks cost at least twice as much.There is a battery backup in this clock that keeps an internal oscillator running when there is a power outage, two AAA batteries can be placed in the clock for that. Contrary what some reviewers have reported as a "defect", these batteries are only there to keep the internal oscillator running during an outage so you won't have to re-adjust the clock after a power outage. These batteries will NOT keep the display illuminated. That is not why these batteries are there, even the video reviewer had not grasped that fact I noticed.I recommend to use old-fashioned carbon-zinc batteries for this backup function, as alkaline-based batteries always start to leak corrosive electrolyte after a while. This will destroy your radio in the process. This leakage happens even when alkaline batteries are hardly used I have noticed, they are terrible in that aspect. Use carbon-zinc instead (often called "heavy duty" batteries)This is in fact my only gripe about this radio, it should have been designed for a lithium coin cell battery instead of the two AAA batteries. Lithium batteries never leak an have an extremely low self discharge.Another nice-to-have would have been a daylight- saving time switch, but not a big deal.Adding it all up, this is a buy I can recommend. The clock is built well and has good brightness (settable by the user)

Best alarm clock I’ve bought. I got this because I want to wake up. The alarm is so annoying and loud it will wake you up under any circumstance, No power? No worries it will still wake you up because you can add 2 AAA batteries to have backup power. You can see the time miles away and weights nothing. Some people will complain that you can only set one alarm, that is fine because you only need one and the snooze button. This alarm clock is meant to wake you up in the mornings with no excuse. I love mine and I’m not planning to replace it any time soon.

Pretty bright light weight , easy to set time time accuracy is up to standard , time noise level is up to standard and seem to be good quality

Giving it a 4 only because I'm still late for work even though it works fine.

Good alarm clock, easy to use and wakes me up. Display can be dimmed down so it's not so bright. Easy to read. Very reasonably priced.

Just received my clock today and am very happy with my purchase. The clock was very easy to assemble and set the time. Wish I would have ordered it sooner. Read the reviews before I ordered and they were all good. I hated my old clock, it was a pain to operate. Would recommend this clock to everyone. it is small & doesn't take up much room on the night stand but is large enough and the display is good. Have not tried the alarm yet but I am sure it will be fine.

Compact, simple plug in alarm clock. It has a battery backup. The alarm is loud enough. It has a 3 level dimming feature for the display. Nice quality.

So funny, arriving today....it's the post office, I hope I get it by Tuesday or Wed.