It's not a constant alarm, it's a Constant alarm!
Yes, I was glad I noticed the C cell battery and the size before I ordered it. I spend another 99p and got this one with takes 1 x AA battery and is only 6 x 6 x 3cm. Perfect for what I needed it for. Edit - Forgot to add the link https://www.argos.co.uk/product/2553579?clickSR=slp:term:alarm clock:2:62:1
There's a large push button on the top to switch the alarm off
Does this clock make the ticking seconds noise or is it quiet?
Didn't relise these were still in use.