RadioShack® Mini Audio Amplifier
Catalog #: 277-1008
$14.99

amazon.com
Belkin Speaker and Headphone Splitter $3.49

PYLE PSP8 All Weather 5-Inch Trumpet Speaker $9.88 each

3.5 mm cable 36 inches long $5.00

9 volt battery for amplifier

iphone or ipod touch or other mp3 player

old cooler (free)

1 inch screws to mount speakers (free)

I got my free sounds here:

http://www.varmintal.com/coy5-20.htm

http://ewcalls.com/call-sounds