Simply attach The BackRight device to a computer screen and you are on your way to better posture. The BackRight immediately lets you know if you are sitting correctly or not. Its always on letting you know if you are sitting properly or are beginning to lean forward. As soon as you start to go from good posture to bad, The BackRight warns you so you can adjust your position and avoid strain that can lead to being caught up in a bad habit that can affect your looks and health. The BackRight does not require batteries to run. Its easy to use The BackRight!