Wireless Sensor Bar for Wii. Don't be limited to the length of our sensor bar cable! Now you can set up your Wireless Sensor Bar wherever you want! Features 2.4Ghz technology for lightning quick response. Powered by 2 AA batteries (not included). Includes a Wireless Sensor Bar with two suction cups for secure set-up and a Wireless Receiver. Simply connect the receiver to the back of your Wii, set up your Wireless Sensor Bar anywhere within 10-15 feet, and you're ready to play!