Wireless replacement sensor bar with extended play range provides Adjustable distance settings for large or small rooms Automatic shut-off feature (1 hour and 2 hour options) extends battery life Low battery indicator light alert - no more unexpectedly dead batteries (uses 4 AA batteries - not included) Officially Licensed by Nintendo. 100% Authentic POWER A Product Go wireless and extend your play range with the Wireless Wii Ultra Sensor Bar! The sleek, minimalistic design looks great in any room and eliminates the need to find an extra wall outlet. The sensor bar features adjustable settings for room size, providing superior performance in larger rooms where players are farther away. A convenient automatic shut-off mechanism conserves battery life and a handy indicator light alerts you to low battery status. As an Officially Licensed Nintendo accessory, this Sensor Bar will not void your game system warranty! Lose the wires and experience a whole new range of gaming fun with this 100% Authentic POWER A Wireless Wii Ultra Sensor Bar, Officially Licensed by Nintendo.