Product thumbnail for Extra Deep Brown Noise with 40 Hz Gamma Binaural Beats showing a pair of dark over-ear headphones against a deep dark brown background with warm amber vertical spectrum bars behind them, an RTA frequency curve in the lower left showing a prominent 40 Hz spike labeled “40 Hz,” with bold white text reading “Extra Deep Brown Noise” and amber text “40 Hz Gamma” and lower text “1 and 10 Hour Audio Downloads.”