Thanks to its infrared cordless design, you can enjoy TV audio wherever you want (approximately 7 meters away), eliminating the need for wires between the TV and the speaker. Equipped with a [Clear Sound] function. By making it easier to hear human voices, you can hear clear sound right at your fingertips. Two levels of sensitivity can be adjusted to suit the TV audio. The user-friendly design, including a large volume knob and button layout, makes operation easy for anyone. The [Auto Power On/Off] function automatically turns the unit on and off in conjunction with the TV audio. If there is no audio input from the TV for a certain period of time, the unit automatically turns off, eliminating the need to worry about forgetting to turn it off. It also features an automatic power-on function that turns the power on in conjunction with the TV audio. Power is provided by the included AC adapter or AA batteries (sold separately). It can be used even when there is no nearby outlet.