These are the 100' range wireless earbuds that clarify and boost the sound of dialog without increasing background volume. The included 5.8 GHz digital transmitter plugs into a television with the included cables (3.5mm, RCA, RCA Coaxial, and Optical) and transmits audio to the earbuds without using Bluetooth, Wi-Fi, or smartphone apps. The earbuds have advanced technology that isolates voice frequencies, lifting dialog audio without increasing a movie or program’s background noise or music. The earbuds have built-in controls that adjust volume and tone and are powered by a lithium-ion battery. Transmitter plugs into AC with included adapter.