In this work, we have presented the TUNEGreen system for monitoring and visualising in real-time the power consumption of wireless network's devices. The demo will provide the conference attendees with the opportunity of experiencing how different Web-based tasks (e.g., downloading a file, watching a movie etc.) can influence the power consumption of the underpinning network infrastructure. Results of the an extensive measurements campaign performed by the authors will also be shown, providing attendees with insight into how various parameters affect the power consumption of wireless nodes.