Let the Birdsong Identiflyer take your birding experience to a new level. Listen for an actual birdsong you want to identify, slide a songcard into the player and press any of the ten buttons until you recognize the recording that matches the real bird song. The Identiflyer Kit comes complete with two songcards, batteries, and guidebook. This is a great starter for anyone interested in birds. Additional songcards are available for additional cost.