Stereo RF Wireless Headphones w/FM tuner Stereo RF Wireless Headphones General Features: Transmits stereo audio signal without wires Uses high frequency RF signals Up to 100-foot operating distance Line-in-sight transmissions Adjustable headband and soft earpad cushion Transmitter operates on three (3) AAA batteries (not included) Headphones operate on Two (2) AAA batteries (not included)