Take a Walkman, hook up the Radio Shack Mini amp #277-1008. Then see if that has a bigg enough speaker if it don't go buy the JS mid-range speaker. For 20 bucks. You got a caller that cost you about 40 bucks. you will need other wires too.#4202420 ( i beleive is for the speaker. but you should need this if you are using the JS speaker.)
#4202434 ( this is to hook the mini amp to the walkman.) If you don't want the JS speaker you can get the PA speaker from RS # 4001440. Then you will need thepart number mentioned above. I beleive thats all you need. Good luck. for mouth calls, rabbit in distress is probly the most common, then you will need a cyote howl. Cronk calls make on for 55 bucks, but its suppose to be really good. You want a long range and close in range rabbit in distress call.