Air-O-Swiss 7142 Humidifier Large room capacity with auto settings With additional extra new supplies: Ionic Silver Stick (AOS 7017) Demineralization Cartridge (AOS 7531) Size is that of a 19L large blue water bottle seen in office settings. Purchased in USA in 2009 120v, with free separate voltage convertor to 220v for use in China. Comes with box for all contents transport (not original box) New: $300 USD + $100 USD supplies & convertor Selling together for $75 USD / 500rmb location: lama temple/yonghegong area; dongcheng