Blower and pumps are somewhat different in their function.
I haven't found too many dc pumps out there in the $40 range...but maybe I'm not looking in the right place. Moreover - the fact that it can handle higher pressure makes it great for IK, SUPs, etc.
It states that it will use the low pressure/high volume pump up until 3 psi then switch over to the high pressure/low volume pump. There is an analog gauge as well integrated into the pump.
seems to have more detail that the first one I posted - but it's the same pump.