Nyko Wireless Sensor Bar for Wii Play up to 25 feet away Allows for clean, easy, wire-free installation Powered by 4 AA batteries (included) Compatible with the Nintendo Wii sensor bar stand Ideal for wall-mounted flat screens Sleek design blends in with TV and is compatible with standard sensor bar stand Audible alarm warns when powered for too long and will even automatically shut off the device The IR field created by the Wireless Sensor Bar allows for play up to 25 feet away 4 AA batteries (included) provide up 30 hours of use; No cords needed Ideal for wall-mounted flat screens