A dual charging dock is the perfect option for those who wish to charge multiple holders at once. As with the Single Charging Dock, additional devices may be charged using an additional USB port.  For best performance it is recommended to use the single dock with IQOS power adaptor sold separately. . It is compatible with IQOS 2.4 and IQOS 2.4 PLUS. Capacity: Two IQOS Pocket Chargers Material: Plastic Dimensions: 99.7 mm x 57.3 mm x 35.8 mm