Manual crank rewind for power cord storage and protection. Thermal overload for long term motor protection. Structural foam tank for maximum durability and mobility Microtex/Permatex + HEPAFLO standard filter. Excellent 0.3 micron filtration at 99.97% efficiency. Telescoping handle makes it compact for storage. On-board storage for more than just vacuum tools. Built in wand holder makes transporting the machine easy.