kaddy kid golf trolley

[tmc 24]

I have recently bought a second hand trolley, could anyone tell me what the third button on the key pad, first two are obviously speed controls but the third just seems to stop it for a couple of seconds before it races off again. Thank you

 

[ScienceBoy]

Usually they have a 10 yard button, press it once for it to roll off on its own for 10 yards.

It could be that?