This bed is provided with very deep grooves on the slabs. For single use only for guests still acceptable, so get the "duration sleepers" soon neck problems because the head constantly rolled out in any holes! The pump is getting used to, since you both hands to turn (turning the pump adapter and gleizeitig holding the pump in the other hand) is required. A power supply would this includes considering the price, because who has already hours to charge when the bed is "now" needed?