How do I get the battery case off to insert the battery? The picture is so small and in black and white that I can’t see anything. Before I take a screw driver to pry it off, I want to ask for help. This is definately not ready for use out of the box.

The Voice Caddie PT30 Putting Trainer battery is replaced by squeezing the battery case.

I am adding the instruction manual for this product that comes from Voice Caddie.

https://voicecaddie.com/wp-content/uploads/2018/05/PT30_Eng_rev_131211_manual.pdf