The Powercube is an air purifier developed for the Chinese market. An aero- dynamic airway enables high performance at lower noise levels and reduced power consumption. The TwinPower system, featuring 2.4 kg NanoProtect Plus filters, generates a clean air capacity that is 60 per cent higher than comparable models in the range. A rotary knob provides ease of use, while the “Auto” button in the middle of the knob enables one-touch control. The status of the indoor air quality is indicated by four different colours.