Open Package Walker’s Game Ear Ultimate Power Muff. Hear Like You’ve Never Heard Before. Two Hi Gain Omni Directional Microphones, 9x Hearing Enhancement, NRR 27 dB, Independent AFT controls. Two Hi Gain Omni Directional Microphones. Adjustable Frequency Tuning – AFT. 2 independent volume controls. Sound activated compression (SAC). Power source 2 Energizer’AAA’ batteries (included). Check out our store for more great deals.