It adjusts brightness levels, and works great even in dimly lit areas. It has an estimated user base of over a million users. The colors are vibrant, with a strong emphasis on detail. I was with my husband for 21 years, we were married for 18 of those and except for the last few they were pretty happy. Good luck with your Eagle watching. If they don't, a moderator (and yes, there is always one around) can and probably will ban them. Simply adjust the microphone levels to achieve optimal performance. This