Nintendo Wireless Ultra Sensor Bar with Extended Play Range for Wii and Wii U - White 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 Officially Licensed by Nintendo. 100% Authentic POWER A Product