A device suitable for treating liquids, in particular contaminated water, which device comprises a treatment chamber and a liquid inlet and a liquid outlet connected to said treatment chamber, wherein a plurality of substantially parallel ultraviolet lamps are disposed in said treatment chamber, wherein said ultraviolet lamps are movable with respect to each other. The tail section comprises a rudder which is movable about an axis to generate a yawing moment on the aerospace vehicle. The POS terminal also accommodates contactless instrument readers and optionally includes features for electronic signature capture, user display interaction, multi-tasking capabilities, check reading and age and identity verification.