Mobile Island combines a modular wireless charger 'Ground' and a wireless charging device 'Building' to create a DIY wireless charging environment at home. The existing wireless charger was recognized as an auxiliary means to charge the smartphone by focusing on products and functions, not on usability. However, Mobile Island added a wooden tray on the existing charger to enhance its usability and modular design to cope with its various usage environments, thus securing originality as an electronic product.