For more volume, connect the FOXPRO Snow Pro External Speaker (10W, 8-ohm) to your Snow Pro speakers. Each speaker that comes with the Snow Pro Digital Game call has a speaker jack built in to it. This will allow you to daisy chain your speakers together for more coverage and additional volume. The Snow Pro Digital Game Call can accept up to four total speakers. This speaker is only compatible with the Snow Pro Digital Game Call. It comes with 12' speaker cable, mounting bracket and 1/4" plug.