I ordered one of the clocks. The first arrived with broken glass, so I ordered a replacement. It also arrived with broken glass. The boxes were undamaged, so the problem is with the packaging done by the manufacturer I put a battery in it to see if it would still work with no glass, and it is unable to receive the time from the atomic clock over two days. There is no way to manually set the time.These clocks are rediculously fragile, and unreliable. Suggest you do not waste your time buying on.