Methods, systems and processor-readable media for portable parking occupancy detection. The communication interface is programmed to pair with at least one mobile device. The end of the drum is rounded to prevent material from becoming lodged between the end of the drum and the conditioner section housing. The camming surface preferably has a steep camming angle. The clasp is engaged by aligning the tab of the latch member with the notch of the shaft member and pushing the shaft member into the open end of the latch member until the tab engages the notch. The first friction facing has a larger friction surface area than the second friction facing.