Bedroom clock recommendations for 3,7 year old

[Lily7050]

DS is 3 years 7 months old. He wakes up at least once a night, sometimes more, asking "Is it morning yet?".
He know numbers but not learned the clock arrows yet.
I think if I get him a clock where he can check time himself and tell him that he should go back to bed unless he sees "7" in hours section, it will help him (and me) to sleep better.
I need something on batteries. We got Tommee Tippee Groclock that request to be connected to the power supply and my DS kept pulling it off.

We used a digital clock at that age and taught them to read 7 am.

Gro clock. Put it somewhere he can't reach.

We got a walk clock similar to this one and put some red tape on the hour hand, with a corresponding red zone on the 7. You can teach your son to watch for the tape on the hand to be in the right area.

Just another idea, I'm sure a digital clock would work too.

Tried Groclock again. DS does not pull it off this time. He understands when it is 7am but gets ups around 5:45am claiming he is not tired and does not want to sleep any more.