Battery-free sensors have the potential to change the landscape of wireless networking. However, due to their ultra-low power nature, these sensors remain crippled in their operation range and their bandwidth of operation. In this talk, I will present two fundamental technologies that allow us to overcome both of these constraints. The first is a technology that allows us to emulate hundreds of MHz of bandwidth on battery-free sensors, whose communication bandwidth is limited to few kHz. The second is a new relay design that can scale the area of operation of battery-free networks by 10x-100x. Finally, I will describe how these technologies can enable new applications in virtual reality, robotic manipulation, and smart manufacturing.