The Power-over-Ethernet (POE) module offers a convenient & cost effective way to deliver power to the I-Series 2.0 for Android. The module means that you can put a DC voltage onto specific pairs of the Ethernet cable so that devices connected to the network can use it as a power source. So instead of requiring a power drop which can be expensive you can run a low voltage network to simplify installation of solutions for shelf signage & AV applications like conference room schedulers or AV control displays.