A device for nasal lavage is described. Thereby, the attack angle of the fairing vane is adapted to the water jet flow so that reduction of pump efficiency is suppressed. The pallet transmitter preferably receives power through a wireless connection to the receiver unit. The sensing unit locates at one side of the panel and the sensing unit senses a plurality of first light signals reflected by an object and senses a plurality second light signals of an ambient light. The optics comprise a geometry and arrangement leading to a mutual overlap of the optics in a direction diagonal, in particular perpendicular, to the field.