The Rock Space AC2100 Dual-band Wi-Fi Range Extender Model RSD0623 in black is a high-performing device that is designed to expand the range and strength of your Wi-Fi connectivity. With its dual-band capabilities, this extender is able to provide a reliable and fast connection for your devices. Its sleek black design and compact size make it easy to set up and use in any room. The Rock Space AC2100 is an excellent choice for improving your home networking and connectivity.