All good points . I have a directional amp with stereo headphones and a dish for better sound ID and location . The nature of the jobs I' ve worked over the years(factories , aircraft carrier) , combined with Father Time finally made this necessary for me . I wasn' t crazy about the idea since I think there are already too many high tech toys out there in the woods , but age and hearing loss conspired to make me see things differently . Proper stereo separation is crucial with amps , so is a gain control to avoid " tornado breeze" effect . Some form of frequency discrimination is a big plus if you don' t want to hear every nutcutter farting nearby , but it' s a feature found only on very expensive models . Walker' s doesn' t offer it that I' m aware of . Don' t buy monaural products , you won' t be able to locate your quarry . And please don' t make the mistake of wearing a monaural on both ears , it' s nearly impossible to balance the two correctly . This will seriously impair your ability to locate the quarry , and can damage your hearing if the units are turned up too much in an attempt to compensate . Unless you' re hearing impaired like me I' d reccomend that you avoid all such products , and spend more time in the woods learning to ID what is making which sound . You' ll be a happier and more skillful hunter in the long run .