Upgrade your wired Wii sensor bar to a wireless replacement</br>No need to add any cable to your wireless environment</br>Self installs with a flip of the on/off switch</br>Batteries: 2 x AAA batteries (batteries not included)</br>Automatically switch to power saving mode to conserve battery power</br></br>Product Description</br></br>Compatible With Nintendo: Wii/ Wii U</br><br/>http://www.amazon.com/gp/product/B003DS6LRW