The only thing that could make the MP3 caller any better was to add an external speaker, so it was added! Now, with a high quality bell housed speaker and an additional 50' cord to get those sounds out and away from your location. The hand held MP3 caller comes complete with 16 pre-programmed animal calls and distress sounds on its 64 MB internal memory or add your own SD card to download your own calls to customize your hunting experience. Six ergonomically placed control buttons allow you easy access to on/off, memory selection, up/down scroll, and a sound override for use with our All Call. The 16 pre-loaded sounds include: several coyote calls, jackrabbit, cottontail, woodpecker, fawn distress and a number of rodent/rabbit sounds. Creates over 120 dB from its external speaker. Comes with USB cable and downloadable instructions. Both caller and speaker are done in an olive drab color to blend into any surrounding. The MP3 with speaker will compete with any electronic caller priced at hundreds of dollars more! Runs on 4 AAA batteries, not included.